diff --git a/.gitignore b/.gitignore
index c2065bc..ba9d2be 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,6 +25,7 @@ bin/
 out/
 !**/src/main/**/out/
 !**/src/test/**/out/
+application.yml
 
 ### NetBeans ###
 /nbproject/private/
diff --git a/build.gradle b/build.gradle
index 728ec9c..0fc19d9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -19,6 +19,8 @@ dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
 	implementation 'org.springframework.boot:spring-boot-starter-web'
 	implementation 'org.springframework.boot:spring-boot-starter-jdbc'
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	implementation 'org.springframework.boot:spring-boot-starter-validation'
 	runtimeOnly 'com.mysql:mysql-connector-j'
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
 }
diff --git a/src/main/java/com/example/demo/advice/GlobalExceptionHandler.java b/src/main/java/com/example/demo/advice/GlobalExceptionHandler.java
new file mode 100644
index 0000000..00d05bb
--- /dev/null
+++ b/src/main/java/com/example/demo/advice/GlobalExceptionHandler.java
@@ -0,0 +1,25 @@
+package com.example.demo.advice;
+
+import com.example.demo.exception.HTTPApiException;
+import org.springframework.dao.EmptyResultDataAccessException;
+import org.springframework.http.HttpStatusCode;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+
+import java.sql.SQLIntegrityConstraintViolationException;
+
+@ControllerAdvice
+public class GlobalExceptionHandler {
+
+    @ExceptionHandler(EmptyResultDataAccessException.class)
+    public ResponseEntity<String> handleEmptyResultDataAccessException(EmptyResultDataAccessException e) {
+        return new ResponseEntity<>("해당 데이터를 찾을 수 없음.", HttpStatusCode.valueOf(404));
+    }
+
+    @ExceptionHandler(HTTPApiException.class)
+    public ResponseEntity<String> handleHTTPApiException(HTTPApiException e) {
+        return new ResponseEntity<>(e.getMessage(), HttpStatusCode.valueOf(e.getHttpCode()));
+    }
+
+}
\ No newline at end of file
diff --git a/src/main/java/com/example/demo/controller/ArticleController.java b/src/main/java/com/example/demo/controller/ArticleController.java
index b28e4dd..c1193b2 100644
--- a/src/main/java/com/example/demo/controller/ArticleController.java
+++ b/src/main/java/com/example/demo/controller/ArticleController.java
@@ -3,6 +3,8 @@
 import java.net.URI;
 import java.util.List;
 
+import com.example.demo.exception.HTTPApiException;
+import com.example.demo.proxyservice.ArticleProxyService;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
@@ -21,16 +23,16 @@
 @RestController
 public class ArticleController {
 
-    private final ArticleService articleService;
+    private final ArticleProxyService articleService;
 
-    public ArticleController(ArticleService articleService) {
+    public ArticleController(ArticleProxyService articleService) {
         this.articleService = articleService;
     }
 
     @GetMapping("/articles")
     public ResponseEntity<List<ArticleResponse>> getArticles(
         @RequestParam Long boardId
-    ) {
+    ) throws HTTPApiException {
         List<ArticleResponse> response = articleService.getByBoardId(boardId);
         return ResponseEntity.ok(response);
     }
@@ -46,7 +48,7 @@ public ResponseEntity<ArticleResponse> getArticle(
     @PostMapping("/articles")
     public ResponseEntity<ArticleResponse> crateArticle(
         @RequestBody ArticleCreateRequest request
-    ) {
+    ) throws HTTPApiException {
         ArticleResponse response = articleService.create(request);
         return ResponseEntity.created(URI.create("/articles/" + response.id())).body(response);
     }
@@ -55,7 +57,7 @@ public ResponseEntity<ArticleResponse> crateArticle(
     public ResponseEntity<ArticleResponse> updateArticle(
         @PathVariable Long id,
         @RequestBody ArticleUpdateRequest request
-    ) {
+    ) throws HTTPApiException {
         ArticleResponse response = articleService.update(id, request);
         return ResponseEntity.ok(response);
     }
@@ -63,7 +65,7 @@ public ResponseEntity<ArticleResponse> updateArticle(
     @DeleteMapping("/articles/{id}")
     public ResponseEntity<Void> updateArticle(
         @PathVariable Long id
-    ) {
+    ) throws HTTPApiException {
         articleService.delete(id);
         return ResponseEntity.noContent().build();
     }
diff --git a/src/main/java/com/example/demo/controller/BoardController.java b/src/main/java/com/example/demo/controller/BoardController.java
index ada81dc..8f5b1b3 100644
--- a/src/main/java/com/example/demo/controller/BoardController.java
+++ b/src/main/java/com/example/demo/controller/BoardController.java
@@ -2,6 +2,8 @@
 
 import java.util.List;
 
+import com.example.demo.exception.HTTPApiException;
+import com.example.demo.proxyservice.BoardProxyService;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
@@ -19,9 +21,9 @@
 @RestController
 public class BoardController {
 
-    private final BoardService boardService;
+    private final BoardProxyService boardService;
 
-    public BoardController(BoardService boardService) {
+    public BoardController(BoardProxyService boardService) {
         this.boardService = boardService;
     }
 
@@ -40,7 +42,7 @@ public BoardResponse getBoard(
     @PostMapping("/boards")
     public BoardResponse createBoard(
         @RequestBody BoardCreateRequest request
-    ) {
+    ) throws HTTPApiException {
         return boardService.createBoard(request);
     }
 
@@ -48,14 +50,14 @@ public BoardResponse createBoard(
     public BoardResponse updateBoard(
         @PathVariable Long id,
         @RequestBody BoardUpdateRequest updateRequest
-    ) {
+    ) throws HTTPApiException {
         return boardService.update(id, updateRequest);
     }
 
     @DeleteMapping("/boards/{id}")
     public ResponseEntity<Void> deleteBoard(
         @PathVariable Long id
-    ) {
+    ) throws HTTPApiException {
         boardService.deleteBoard(id);
         return ResponseEntity.noContent().build();
     }
diff --git a/src/main/java/com/example/demo/controller/LoginController.java b/src/main/java/com/example/demo/controller/LoginController.java
new file mode 100644
index 0000000..1d29372
--- /dev/null
+++ b/src/main/java/com/example/demo/controller/LoginController.java
@@ -0,0 +1,62 @@
+package com.example.demo.controller;
+
+import com.example.demo.entity.Member;
+import com.example.demo.exception.HTTPApiException;
+import com.example.demo.proxyservice.ArticleProxyService;
+import com.example.demo.proxyservice.LoginProxyService;
+import com.example.demo.proxyservice.MemberProxyService;
+import jakarta.servlet.http.HttpServletRequest;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.SessionAttribute;
+
+@Controller
+public class LoginController {
+
+    private final LoginProxyService loginService;
+    private final ArticleProxyService articleService;
+
+    public LoginController(LoginProxyService loginService, ArticleProxyService articleService) {
+        this.loginService = loginService;
+        this.articleService = articleService;
+    }
+
+    @GetMapping("/login")
+    public String getLoginPage() {
+        return "login";
+    }
+
+    @PostMapping("/login")
+    public String postLoginPage(
+            @RequestParam(required = false) String email,
+            @RequestParam(required = false) String password,
+            HttpServletRequest request
+    ) throws HTTPApiException {
+        return loginService.login(email, password, request);
+    }
+
+    @GetMapping("/showmethearticles")
+    public String myArticles(
+            @SessionAttribute(name = "loginMember", required = false) Member member,
+            Model model
+    ) throws HTTPApiException {
+        return loginService.myArticles(member, model);
+    }
+
+    @GetMapping("/sign")
+    public String getSignPage() {
+        return "sign";
+    }
+
+    @PostMapping("/sign")
+    public String postSign(
+            @RequestParam(required = false)String name,
+            @RequestParam(required = false)String email,
+            @RequestParam(required = false)String password
+    ) throws HTTPApiException {
+        return loginService.postSign(name, email, password);
+    }
+}
diff --git a/src/main/java/com/example/demo/controller/MemberController.java b/src/main/java/com/example/demo/controller/MemberController.java
index ddb18ec..c0f0df7 100644
--- a/src/main/java/com/example/demo/controller/MemberController.java
+++ b/src/main/java/com/example/demo/controller/MemberController.java
@@ -2,6 +2,8 @@
 
 import java.util.List;
 
+import com.example.demo.exception.HTTPApiException;
+import com.example.demo.proxyservice.MemberProxyService;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
@@ -19,9 +21,9 @@
 @RestController
 public class MemberController {
 
-    private final MemberService memberService;
+    private final MemberProxyService memberService;
 
-    public MemberController(MemberService memberService) {
+    public MemberController(MemberProxyService memberService) {
         this.memberService = memberService;
     }
 
@@ -42,7 +44,7 @@ public ResponseEntity<MemberResponse> getMember(
     @PostMapping("/members")
     public ResponseEntity<MemberResponse> create(
         @RequestBody MemberCreateRequest request
-    ) {
+    ) throws HTTPApiException {
         MemberResponse response = memberService.create(request);
         return ResponseEntity.ok(response);
     }
@@ -51,7 +53,7 @@ public ResponseEntity<MemberResponse> create(
     public ResponseEntity<MemberResponse> updateMember(
         @PathVariable Long id,
         @RequestBody MemberUpdateRequest request
-    ) {
+    ) throws HTTPApiException {
         MemberResponse response = memberService.update(id, request);
         return ResponseEntity.ok(response);
     }
@@ -59,7 +61,7 @@ public ResponseEntity<MemberResponse> updateMember(
     @DeleteMapping("/members/{id}")
     public ResponseEntity<Void> deleteMember(
         @PathVariable Long id
-    ) {
+    ) throws HTTPApiException {
         memberService.delete(id);
         return ResponseEntity.noContent().build();
     }
diff --git a/src/main/java/com/example/demo/controller/PageController.java b/src/main/java/com/example/demo/controller/PageController.java
index da08efc..3676e92 100644
--- a/src/main/java/com/example/demo/controller/PageController.java
+++ b/src/main/java/com/example/demo/controller/PageController.java
@@ -1,7 +1,17 @@
 package com.example.demo.controller;
 
+import com.example.demo.entity.Member;
+import com.example.demo.exception.HTTPApiException;
+import com.example.demo.proxyservice.ArticleProxyService;
+import com.example.demo.proxyservice.MemberProxyService;
+import com.example.demo.service.MemberService;
+import jakarta.servlet.http.HttpServletRequest;
 import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.SessionAttribute;
 
 
 @Controller
@@ -23,4 +33,5 @@ public String getArticlesPage() {
     public String getArticleDetailPage() {
         return "article";
     }
+
 }
diff --git a/src/main/java/com/example/demo/controller/dto/request/ArticleUpdateRequest.java b/src/main/java/com/example/demo/controller/dto/request/ArticleUpdateRequest.java
index aced461..1177957 100644
--- a/src/main/java/com/example/demo/controller/dto/request/ArticleUpdateRequest.java
+++ b/src/main/java/com/example/demo/controller/dto/request/ArticleUpdateRequest.java
@@ -1,6 +1,7 @@
 package com.example.demo.controller.dto.request;
 
 public record ArticleUpdateRequest(
+    Long authorId,
     Long boardId,
     String title,
     String description
diff --git a/src/main/java/com/example/demo/controller/dto/response/ArticleResponse.java b/src/main/java/com/example/demo/controller/dto/response/ArticleResponse.java
index 65f048f..3c33f18 100644
--- a/src/main/java/com/example/demo/controller/dto/response/ArticleResponse.java
+++ b/src/main/java/com/example/demo/controller/dto/response/ArticleResponse.java
@@ -2,9 +2,9 @@
 
 import java.time.LocalDateTime;
 
-import com.example.demo.domain.Article;
-import com.example.demo.domain.Board;
-import com.example.demo.domain.Member;
+import com.example.demo.entity.Article;
+import com.example.demo.entity.Board;
+import com.example.demo.entity.Member;
 import com.fasterxml.jackson.annotation.JsonFormat;
 import com.fasterxml.jackson.databind.PropertyNamingStrategies.SnakeCaseStrategy;
 import com.fasterxml.jackson.databind.annotation.JsonNaming;
@@ -24,11 +24,11 @@ public record ArticleResponse(
     LocalDateTime modifiedDate
 ) {
 
-    public static ArticleResponse of(Article article, Member member, Board board) {
+    public static ArticleResponse of(Article article) {
         return new ArticleResponse(
             article.getId(),
-            member.getId(),
-            board.getId(),
+            article.getAuthor().getId(),
+            article.getBoard().getId(),
             article.getTitle(),
             article.getContent(),
             article.getCreatedAt(),
diff --git a/src/main/java/com/example/demo/controller/dto/response/BoardResponse.java b/src/main/java/com/example/demo/controller/dto/response/BoardResponse.java
index 01f6e3e..d359d7c 100644
--- a/src/main/java/com/example/demo/controller/dto/response/BoardResponse.java
+++ b/src/main/java/com/example/demo/controller/dto/response/BoardResponse.java
@@ -1,6 +1,6 @@
 package com.example.demo.controller.dto.response;
 
-import com.example.demo.domain.Board;
+import com.example.demo.entity.Board;
 
 public record BoardResponse(
     Long id,
diff --git a/src/main/java/com/example/demo/controller/dto/response/MemberResponse.java b/src/main/java/com/example/demo/controller/dto/response/MemberResponse.java
index f79aeb6..f9aa55c 100644
--- a/src/main/java/com/example/demo/controller/dto/response/MemberResponse.java
+++ b/src/main/java/com/example/demo/controller/dto/response/MemberResponse.java
@@ -1,6 +1,6 @@
 package com.example.demo.controller.dto.response;
 
-import com.example.demo.domain.Member;
+import com.example.demo.entity.Member;
 
 public record MemberResponse(
     Long id,
diff --git a/src/main/java/com/example/demo/domain/Article.java b/src/main/java/com/example/demo/domain/Article.java
deleted file mode 100644
index e0183db..0000000
--- a/src/main/java/com/example/demo/domain/Article.java
+++ /dev/null
@@ -1,85 +0,0 @@
-package com.example.demo.domain;
-
-import java.time.LocalDateTime;
-
-public class Article {
-
-    private Long id;
-    private Long authorId;
-    private Long boardId;
-    private String title;
-    private String content;
-    private LocalDateTime createdAt;
-    private LocalDateTime modifiedAt;
-
-    public Article(
-        Long id,
-        Long authorId,
-        Long boardId,
-        String title,
-        String content,
-        LocalDateTime createdAt,
-        LocalDateTime modifiedAt
-    ) {
-        this.id = id;
-        this.authorId = authorId;
-        this.boardId = boardId;
-        this.title = title;
-        this.content = content;
-        this.createdAt = createdAt;
-        this.modifiedAt = modifiedAt;
-    }
-
-    public Article(Long authorId, Long boardId, String title, String content) {
-        this.id = null;
-        this.authorId = authorId;
-        this.boardId = boardId;
-        this.title = title;
-        this.content = content;
-        this.createdAt = LocalDateTime.now();
-        this.modifiedAt = LocalDateTime.now();
-    }
-
-    public void update(Long boardId, String title, String description) {
-        this.boardId = boardId;
-        this.title = title;
-        this.content = description;
-        this.modifiedAt = LocalDateTime.now();
-    }
-
-    public void setId(Long id) {
-        this.id = id;
-    }
-
-    public void setModifiedAt(LocalDateTime modifiedAt) {
-        this.modifiedAt = modifiedAt;
-    }
-
-    public Long getId() {
-        return id;
-    }
-
-    public Long getAuthorId() {
-        return authorId;
-    }
-
-    public Long getBoardId() {
-        return boardId;
-    }
-
-    public String getTitle() {
-        return title;
-    }
-
-    public String getContent() {
-        return content;
-    }
-
-    public LocalDateTime getCreatedAt() {
-        return createdAt;
-    }
-
-    public LocalDateTime getModifiedAt() {
-        return modifiedAt;
-    }
-}
diff --git a/src/main/java/com/example/demo/domain/Board.java b/src/main/java/com/example/demo/domain/Board.java
deleted file mode 100644
index 992e2c6..0000000
--- a/src/main/java/com/example/demo/domain/Board.java
+++ /dev/null
@@ -1,32 +0,0 @@
-package com.example.demo.domain;
-
-public class Board {
-
-    private Long id;
-    private String name;
-
-    public Board(Long id, String name) {
-        this.id = id;
-        this.name = name;
-    }
-
-    public Board(String name) {
-        this.name = name;
-    }
-
-    public Long getId() {
-        return id;
-    }
-
-    public void setId(Long id) {
-        this.id = id;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public void update(String name) {
-        this.name = name;
-    }
-}
diff --git a/src/main/java/com/example/demo/entity/Article.java b/src/main/java/com/example/demo/entity/Article.java
new file mode 100644
index 0000000..690749a
--- /dev/null
+++ b/src/main/java/com/example/demo/entity/Article.java
@@ -0,0 +1,97 @@
+package com.example.demo.entity;
+
+import jakarta.persistence.*;
+
+import java.time.LocalDateTime;
+
+@Entity
+@Table(name = "article")
+public class Article {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "author_id")
+    private Member author;
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "board_id")
+    private Board board;
+    private String title;
+    private String content;
+    @Column(name = "created_date")
+    private LocalDateTime createdAt;
+    @Column(name = "modified_date")
+    private LocalDateTime modifiedAt;
+
+    public Article() {
+    }
+
+    public Article(
+        Long id,
+        Member author,
+        Board board,
+        String title,
+        String content
+    ) {
+        this.id = id;
+        this.author = author;
+        this.board = board;
+        this.title = title;
+        this.content = content;
+    }
+
+    public Article(Member author, Board board, String title, String content) {
+        this.author = author;
+        this.board = board;
+        this.title = title;
+        this.content = content;
+        this.createdAt = LocalDateTime.now();
+        this.modifiedAt = LocalDateTime.now();
+    }
+
+    public void update(Member author, Board board, String title, String description) {
+        this.author = author;
+        this.board = board;
+        this.title = title;
+        this.content = description;
+        this.modifiedAt = LocalDateTime.now();
+    }
+
+    public void convenienceMethod(Member author, Board board) {
+        author.addArticle(this);
+        board.addArticle(this);
+    }
+
+    public void setModifiedAt(LocalDateTime modifiedAt) {
+        this.modifiedAt = modifiedAt;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public Member getAuthor() {
+        return author;
+    }
+
+    public Board getBoard() {
+        return board;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public LocalDateTime getModifiedAt() {
+        return modifiedAt;
+    }
+}
diff --git a/src/main/java/com/example/demo/entity/Board.java b/src/main/java/com/example/demo/entity/Board.java
new file mode 100644
index 0000000..d9b53b8
--- /dev/null
+++ b/src/main/java/com/example/demo/entity/Board.java
@@ -0,0 +1,52 @@
+package com.example.demo.entity;
+
+import jakarta.persistence.*;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Entity
+@Table(name = "board")
+public class Board {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+    private String name;
+    @OneToMany(mappedBy = "board")
+    private List<Article> articles = new ArrayList<>();
+
+    public Board() {
+
+    }
+
+    public Board(Long id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public void addArticle(Article article) {
+        articles.add(article);
+    }
+
+    public Board(String name) {
+        this.name = name;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void update(String name) {
+        this.name = name;
+    }
+
+    public List<Article> getArticles() {
+        return articles;
+    }
+
+}
diff --git a/src/main/java/com/example/demo/domain/Member.java b/src/main/java/com/example/demo/entity/Member.java
similarity index 63%
rename from src/main/java/com/example/demo/domain/Member.java
rename to src/main/java/com/example/demo/entity/Member.java
index fe80d6b..00d9698 100644
--- a/src/main/java/com/example/demo/domain/Member.java
+++ b/src/main/java/com/example/demo/entity/Member.java
@@ -1,11 +1,26 @@
-package com.example.demo.domain;
+package com.example.demo.entity;
 
+import jakarta.persistence.*;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Entity
+@Table(name = "member")
 public class Member {
 
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
     private String name;
     private String email;
     private String password;
+    @OneToMany(mappedBy = "author")
+    private List<Article> articles = new ArrayList<>();
+
+    public Member() {
+
+    }
 
     public Member(Long id, String name, String email, String password) {
         this.id = id;
@@ -20,15 +35,15 @@ public Member(String name, String email, String password) {
         this.password = password;
     }
 
+    public void addArticle(Article article) {
+        articles.add(article);
+    }
+
     public void update(String name, String email) {
         this.name = name;
         this.email = email;
     }
 
-    public void setId(Long id) {
-        this.id = id;
-    }
-
     public Long getId() {
         return id;
     }
@@ -41,6 +56,10 @@ public String getEmail() {
         return email;
     }
 
+    public List<Article> getArticles() {
+        return articles;
+    }
+
     public String getPassword() {
         return password;
     }
diff --git a/src/main/java/com/example/demo/exception/ExceptionType.java b/src/main/java/com/example/demo/exception/ExceptionType.java
new file mode 100644
index 0000000..82cffe9
--- /dev/null
+++ b/src/main/java/com/example/demo/exception/ExceptionType.java
@@ -0,0 +1,38 @@
+package com.example.demo.exception;
+
+public enum ExceptionType {
+
+    Server_Error(505, "알 수 없는 서버 에러 (벡엔드 개발자에게 직접 문의해주세요.)"),
+    Member_NotNullName(400, "'name' 값이 Null이 될 수 없습니다."),
+    Member_NotNullEmail(400, "'email' 값이 Null이 될 수 없습니다."),
+    Member_NotNullPassWord(400, "'password' 값이 Null이 될 수 없습니다."),
+    Member_OverLapEmail(409, "'email' 값은 중복 될 수 없습니다."),
+    Member_CantDelete(400, "유저가 작성한 게시물이 존재하기 때문에 삭제 할 수 없습니다."),
+    Member_IsNull(400, "유저가 존재하지 않습니다."),
+    Board_NotNullName(400, "'name' 값이 Null이 될 수 없습니다."),
+    Board_CantDelete(400, "게시판에 작성된 게시물이 존재하기 때문에 삭제 할 수 없습니다."),
+    Board_IsNull(400, "게시판이 존재하지 않습니다."),
+    Article_NotNullAuthorId(400, "'authorId' 값이 Null이 될 수 없습니다."),
+    Article_NotNullBoardId(400, "'boardId' 값이 Null이 될 수 없습니다."),
+    Article_NotNullTitle(400, "'title' 값이 Null이 될 수 없습니다."),
+    Article_NotNullDescription(400, "'description' 값이 Null이 될 수 없습니다."),
+    Article_IsNull(400, "게시물이 존재하지 않습니다.")
+    ;
+
+    private final int httpstate;
+    private final String message;
+
+    ExceptionType(int httpstate, String message) {
+        this.httpstate = httpstate;
+        this.message = message;
+    }
+
+    public int getHttpstate() {
+        return httpstate;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+}
diff --git a/src/main/java/com/example/demo/exception/HTTPApiException.java b/src/main/java/com/example/demo/exception/HTTPApiException.java
new file mode 100644
index 0000000..a570f20
--- /dev/null
+++ b/src/main/java/com/example/demo/exception/HTTPApiException.java
@@ -0,0 +1,19 @@
+package com.example.demo.exception;
+
+public class HTTPApiException extends Exception {
+
+    private final ExceptionType type;
+
+    public HTTPApiException(ExceptionType type) {
+        this.type = type;
+    }
+
+    public int getHttpCode() {
+        return type.getHttpstate();
+    }
+
+    public String getMessage() {
+        return type.getMessage();
+    }
+
+}
diff --git a/src/main/java/com/example/demo/proxyservice/ArticleProxyService.java b/src/main/java/com/example/demo/proxyservice/ArticleProxyService.java
new file mode 100644
index 0000000..b6a6537
--- /dev/null
+++ b/src/main/java/com/example/demo/proxyservice/ArticleProxyService.java
@@ -0,0 +1,55 @@
+package com.example.demo.proxyservice;
+
+import com.example.demo.controller.dto.request.ArticleCreateRequest;
+import com.example.demo.controller.dto.request.ArticleUpdateRequest;
+import com.example.demo.controller.dto.response.ArticleResponse;
+import com.example.demo.exception.ExceptionType;
+import com.example.demo.exception.HTTPApiException;
+import com.example.demo.service.ArticleService;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class ArticleProxyService {
+
+    private final ArticleService articleservice;
+
+    public ArticleProxyService(ArticleService articleservice) {
+        this.articleservice = articleservice;
+    }
+
+    public List<ArticleResponse> getByBoardId(Long boardId) throws HTTPApiException {
+        if(!articleservice.isExistBoard(boardId)) throw new HTTPApiException(ExceptionType.Board_IsNull);
+        return articleservice.getByBoardId(boardId);
+    }
+
+    public ArticleResponse getById(Long id) {
+        return articleservice.getById(id);
+    }
+
+    public ArticleResponse create(ArticleCreateRequest request) throws HTTPApiException {
+        if(request.authorId()==null) throw new HTTPApiException(ExceptionType.Article_NotNullAuthorId);
+        if(request.boardId()==null) throw new HTTPApiException(ExceptionType.Article_NotNullBoardId);
+        if(request.title()==null) throw new HTTPApiException(ExceptionType.Article_NotNullTitle);
+        if(request.description()==null) throw new HTTPApiException(ExceptionType.Article_NotNullDescription);
+        if(!articleservice.isExistBoard(request.boardId())) throw new HTTPApiException(ExceptionType.Board_IsNull);
+        if(!articleservice.isExistUser(request.authorId())) throw new HTTPApiException(ExceptionType.Member_IsNull);
+        return articleservice.create(request);
+    }
+
+    public ArticleResponse update(Long id, ArticleUpdateRequest request) throws HTTPApiException {
+        if(request.authorId()==null) throw new HTTPApiException(ExceptionType.Article_NotNullAuthorId);
+        if(request.boardId()==null) throw new HTTPApiException(ExceptionType.Article_NotNullBoardId);
+        if(request.title()==null) throw new HTTPApiException(ExceptionType.Article_NotNullTitle);
+        if(request.description()==null) throw new HTTPApiException(ExceptionType.Article_NotNullDescription);
+        if(!articleservice.isExistBoard(request.boardId())) throw new HTTPApiException(ExceptionType.Board_IsNull);
+        if(!articleservice.isExistUser(request.authorId())) throw new HTTPApiException(ExceptionType.Member_IsNull);
+        return articleservice.update(id, request);
+    }
+
+    public void delete(Long id) throws HTTPApiException {
+        if(!articleservice.isExist(id)) throw new HTTPApiException(ExceptionType.Article_IsNull);
+        articleservice.delete(id);
+    }
+}
diff --git a/src/main/java/com/example/demo/proxyservice/BoardProxyService.java b/src/main/java/com/example/demo/proxyservice/BoardProxyService.java
new file mode 100644
index 0000000..8451841
--- /dev/null
+++ b/src/main/java/com/example/demo/proxyservice/BoardProxyService.java
@@ -0,0 +1,48 @@
+package com.example.demo.proxyservice;
+
+import com.example.demo.controller.dto.request.BoardCreateRequest;
+import com.example.demo.controller.dto.request.BoardUpdateRequest;
+import com.example.demo.controller.dto.response.BoardResponse;
+import com.example.demo.exception.ExceptionType;
+import com.example.demo.exception.HTTPApiException;
+import com.example.demo.service.BoardService;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class BoardProxyService {
+
+    private final BoardService boardservice;
+
+    public BoardProxyService(BoardService boardservice) {
+        this.boardservice = boardservice;
+    }
+
+    public List<BoardResponse> getBoards() {
+        return boardservice.getBoards();
+    }
+
+    public BoardResponse getBoardById(Long id) {
+        return boardservice.getBoardById(id);
+    }
+
+    public BoardResponse createBoard(BoardCreateRequest request) throws HTTPApiException {
+        if(request.name()==null) throw new HTTPApiException(ExceptionType.Board_NotNullName);
+        return boardservice.createBoard(request);
+    }
+
+    public BoardResponse update(Long id, BoardUpdateRequest updateRequest) throws HTTPApiException {
+        if(updateRequest.name()==null) throw new HTTPApiException(ExceptionType.Board_NotNullName);
+        return boardservice.update(id, updateRequest);
+    }
+
+    public void deleteBoard(Long id) throws HTTPApiException {
+        if(!boardservice.isExist(id)) throw new HTTPApiException(ExceptionType.Board_IsNull);
+        try{
+            boardservice.deleteBoard(id);
+        }catch(Exception e) {
+            throw new HTTPApiException(ExceptionType.Board_CantDelete);
+        }
+    }
+}
diff --git a/src/main/java/com/example/demo/proxyservice/LoginProxyService.java b/src/main/java/com/example/demo/proxyservice/LoginProxyService.java
new file mode 100644
index 0000000..edfd940
--- /dev/null
+++ b/src/main/java/com/example/demo/proxyservice/LoginProxyService.java
@@ -0,0 +1,64 @@
+package com.example.demo.proxyservice;
+
+import com.example.demo.controller.dto.request.MemberCreateRequest;
+import com.example.demo.entity.Member;
+import com.example.demo.exception.HTTPApiException;
+import com.example.demo.service.LoginService;
+import com.example.demo.service.MemberService;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpSession;
+import org.springframework.stereotype.Service;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.SessionAttribute;
+
+@Service
+public class LoginProxyService {
+
+    private final LoginService loginservice;
+
+    public LoginProxyService(LoginService loginservice) {
+        this.loginservice = loginservice;
+    }
+
+    public String login(
+            @RequestParam(required = false) String email,
+            @RequestParam(required = false) String password,
+            HttpServletRequest request
+    ) throws HTTPApiException {
+        if(email==null||password==null) {
+            return "redirect:/login";
+        }
+        Member loginmember = loginservice.getMemberWithLogin(email, password);
+        HttpSession session = request.getSession();
+        session.setAttribute("loginMember", loginmember);
+        return "redirect:/showmethearticles";
+    }
+
+    public String myArticles(
+            @SessionAttribute(name = "loginMember", required = false) Member member,
+            Model model
+    ) throws HTTPApiException {
+        if(member==null) {
+            return "redirect:/login";
+        }
+        model.addAttribute("articles", loginservice.getByMemberId(member.getId()));
+        return "showmethearticles";
+    }
+
+    public String postSign(
+            @RequestParam(required = false)String name,
+            @RequestParam(required = false)String email,
+            @RequestParam(required = false)String password
+    ) throws HTTPApiException {
+        if(name==null||email==null||password==null) {
+            return "redirect:/regist";
+        }
+        if(loginservice.isExistEmail(email)) {
+            return "redirect:/regist";
+        }
+        loginservice.create(new MemberCreateRequest(name, email, password));
+        return "redirect:/login";
+    }
+
+}
diff --git a/src/main/java/com/example/demo/proxyservice/MemberProxyService.java b/src/main/java/com/example/demo/proxyservice/MemberProxyService.java
new file mode 100644
index 0000000..c11b369
--- /dev/null
+++ b/src/main/java/com/example/demo/proxyservice/MemberProxyService.java
@@ -0,0 +1,59 @@
+package com.example.demo.proxyservice;
+
+import com.example.demo.controller.dto.request.MemberCreateRequest;
+import com.example.demo.controller.dto.request.MemberUpdateRequest;
+import com.example.demo.controller.dto.response.MemberResponse;
+import com.example.demo.entity.Article;
+import com.example.demo.entity.Member;
+import com.example.demo.exception.ExceptionType;
+import com.example.demo.exception.HTTPApiException;
+import com.example.demo.service.MemberService;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpSession;
+import org.springframework.stereotype.Service;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.SessionAttribute;
+
+import java.util.List;
+
+@Service
+public class MemberProxyService {
+
+    private final MemberService memberservice;
+
+    public MemberProxyService(MemberService memberservice) {
+        this.memberservice = memberservice;
+    }
+
+    public List<MemberResponse> getAll() {
+        return memberservice.getAll();
+    }
+
+    public MemberResponse getById(Long id) {
+        return memberservice.getById(id);
+    }
+
+    public MemberResponse create(MemberCreateRequest request) throws HTTPApiException {
+        if(request.name()==null) throw new HTTPApiException(ExceptionType.Member_NotNullName);
+        if(request.email()==null) throw new HTTPApiException(ExceptionType.Member_NotNullEmail);
+        if(request.password()==null) throw new HTTPApiException(ExceptionType.Member_NotNullPassWord);
+        if(memberservice.isExistEmail(0L, request.email())) throw new HTTPApiException(ExceptionType.Member_OverLapEmail);
+        return memberservice.create(request);
+    }
+
+    public MemberResponse update(Long id, MemberUpdateRequest request) throws HTTPApiException {
+        if(request.name()==null) throw new HTTPApiException(ExceptionType.Member_NotNullName);
+        if(request.email()==null) throw new HTTPApiException(ExceptionType.Member_NotNullEmail);
+        if(memberservice.isExistEmail(id, request.email())) throw new HTTPApiException(ExceptionType.Member_OverLapEmail);
+        return memberservice.update(id, request);
+    }
+
+    public void delete(Long id) throws HTTPApiException {
+        if(!memberservice.isExistUser(id)) throw new HTTPApiException(ExceptionType.Member_IsNull);
+        try{
+            memberservice.delete(id);
+        }catch(Exception e) {
+            throw new HTTPApiException(ExceptionType.Member_CantDelete);
+        }
+    }
+}
diff --git a/src/main/java/com/example/demo/repository/ArticleRepository.java b/src/main/java/com/example/demo/repository/ArticleRepository.java
index be3ebd4..f43ab27 100644
--- a/src/main/java/com/example/demo/repository/ArticleRepository.java
+++ b/src/main/java/com/example/demo/repository/ArticleRepository.java
@@ -2,21 +2,30 @@
 
 import java.util.List;
 
-import com.example.demo.domain.Article;
+import com.example.demo.entity.Board;
+import com.example.demo.entity.Member;
+import jakarta.persistence.EntityManager;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
 
-public interface ArticleRepository {
+import com.example.demo.entity.Article;
 
-    List<Article> findAll();
+@Repository
+public interface ArticleRepository extends JpaRepository<Article, Long> {
 
-    List<Article> findAllByBoardId(Long boardId);
+    default Article insert(Article article) {
+        return save(article);
+    }
 
-    List<Article> findAllByMemberId(Long memberId);
+    default Article update(Article article) {
+        return save(article);
+    }
 
-    Article findById(Long id);
+    default void deleteById(Long id) {
+        delete(findById(id).get());
+    }
 
-    Article insert(Article article);
-
-    Article update(Article article);
-
-    void deleteById(Long id);
+    default boolean isExist(Long id) {
+        return findById(id).isPresent();
+    }
 }
diff --git a/src/main/java/com/example/demo/repository/ArticleRepositoryJdbc.java b/src/main/java/com/example/demo/repository/ArticleRepositoryJdbc.java
deleted file mode 100644
index c9a272e..0000000
--- a/src/main/java/com/example/demo/repository/ArticleRepositoryJdbc.java
+++ /dev/null
@@ -1,108 +0,0 @@
-package com.example.demo.repository;
-
-import java.sql.PreparedStatement;
-import java.util.List;
-
-import org.springframework.jdbc.core.JdbcTemplate;
-import org.springframework.jdbc.core.RowMapper;
-import org.springframework.jdbc.support.GeneratedKeyHolder;
-import org.springframework.jdbc.support.KeyHolder;
-import org.springframework.stereotype.Repository;
-
-import com.example.demo.domain.Article;
-
-@Repository
-public class ArticleRepositoryJdbc implements ArticleRepository {
-
-    private final JdbcTemplate jdbcTemplate;
-
-    public ArticleRepositoryJdbc(JdbcTemplate jdbcTemplate) {
-        this.jdbcTemplate = jdbcTemplate;
-    }
-
-    private static final RowMapper<Article> articleRowMapper = (rs, rowNum) -> new Article(
-        rs.getLong("id"),
-        rs.getLong("author_id"),
-        rs.getLong("board_id"),
-        rs.getString("title"),
-        rs.getString("content"),
-        rs.getTimestamp("created_date").toLocalDateTime(),
-        rs.getTimestamp("modified_date").toLocalDateTime()
-    );
-
-    @Override
-    public List<Article> findAll() {
-        return jdbcTemplate.query("""
-            SELECT id,  board_id,  author_id,  title,  content,  created_date,  modified_date
-            FROM article
-            """, articleRowMapper);
-    }
-
-    @Override
-    public List<Article> findAllByBoardId(Long boardId) {
-        return jdbcTemplate.query("""
-            SELECT id,  board_id,  author_id,  title,  content,  created_date,  modified_date
-            FROM article
-            WHERE board_id = ?
-            """, articleRowMapper, boardId);
-    }
-
-    @Override
-    public List<Article> findAllByMemberId(Long memberId) {
-        return jdbcTemplate.query("""
-            SELECT id,  board_id,  author_id,  title,  content,  created_date,  modified_date
-            FROM article
-            WHERE author_id = ?
-            """, articleRowMapper, memberId);
-    }
-
-    @Override
-    public Article findById(Long id) {
-        return jdbcTemplate.queryForObject("""
-            SELECT id,  board_id,  author_id,  title,  content,  created_date,  modified_date
-            FROM article
-            WHERE id = ?
-            """, articleRowMapper, id);
-    }
-
-    @Override
-    public Article insert(Article article) {
-        KeyHolder keyHolder = new GeneratedKeyHolder();
-        jdbcTemplate.update(con -> {
-            PreparedStatement ps = con.prepareStatement("""
-                    INSERT INTO article (board_id, author_id, title, content)
-                    VALUES (?, ?, ?, ?)
-                    """,
-                new String[]{"id"});
-            ps.setLong(1, article.getBoardId());
-            ps.setLong(2, article.getAuthorId());
-            ps.setString(3, article.getTitle());
-            ps.setString(4, article.getContent());
-            return ps;
-        }, keyHolder);
-        return findById(keyHolder.getKey().longValue());
-    }
-
-    @Override
-    public Article update(Article article) {
-        jdbcTemplate.update("""
-                UPDATE article
-                SET board_id = ?, title = ?, content = ?
-                WHERE id = ?
-                """,
-            article.getBoardId(),
-            article.getTitle(),
-            article.getContent(),
-            article.getId()
-        );
-        return findById(article.getId());
-    }
-
-    @Override
-    public void deleteById(Long id) {
-        jdbcTemplate.update("""
-            DELETE FROM article
-            WHERE id = ?
-            """, id);
-    }
-}
diff --git a/src/main/java/com/example/demo/repository/ArticleRepositoryMemory.java b/src/main/java/com/example/demo/repository/ArticleRepositoryMemory.java
deleted file mode 100644
index 13ba78b..0000000
--- a/src/main/java/com/example/demo/repository/ArticleRepositoryMemory.java
+++ /dev/null
@@ -1,70 +0,0 @@
-package com.example.demo.repository;
-
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.atomic.AtomicLong;
-
-import com.example.demo.domain.Article;
-
-public class ArticleRepositoryMemory implements ArticleRepository {
-
-    private static final Map<Long, Article> articles = new HashMap<>();
-    private static final AtomicLong autoincrement = new AtomicLong(1);
-
-    @Override
-    public List<Article> findAll() {
-        return articles.entrySet().stream()
-            .map(it -> {
-                Article article = it.getValue();
-                article.setId(it.getKey());
-                return article;
-            }).toList();
-    }
-
-    @Override
-    public List<Article> findAllByBoardId(Long boardId) {
-        return articles.entrySet().stream()
-            .filter(it -> it.getValue().getBoardId().equals(boardId))
-            .map(it -> {
-                Article article = it.getValue();
-                article.setId(it.getKey());
-                return article;
-            }).toList();
-    }
-
-    @Override
-    public List<Article> findAllByMemberId(Long memberId) {
-        return articles.entrySet().stream()
-            .filter(it -> it.getValue().getAuthorId().equals(memberId))
-            .map(it -> {
-                Article article = it.getValue();
-                article.setId(it.getKey());
-                return article;
-            }).toList();
-    }
-
-    @Override
-    public Article findById(Long id) {
-        return articles.getOrDefault(id, null);
-    }
-
-    @Override
-    public Article insert(Article article) {
-        long id = autoincrement.getAndIncrement();
-        articles.put(id, article);
-        article.setId(id);
-        return article;
-    }
-
-    @Override
-    public Article update(Article article) {
-        articles.put(article.getId(), article);
-        return article;
-    }
-
-    @Override
-    public void deleteById(Long id) {
-        articles.remove(id);
-    }
-}
diff --git a/src/main/java/com/example/demo/repository/BoardRepository.java b/src/main/java/com/example/demo/repository/BoardRepository.java
index cc2dfd0..fabe981 100644
--- a/src/main/java/com/example/demo/repository/BoardRepository.java
+++ b/src/main/java/com/example/demo/repository/BoardRepository.java
@@ -2,17 +2,29 @@
 
 import java.util.List;
 
-import com.example.demo.domain.Board;
+import jakarta.persistence.EntityManager;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.stereotype.Repository;
 
-public interface BoardRepository {
+import com.example.demo.entity.Board;
 
-    List<Board> findAll();
+@Repository
+public interface BoardRepository extends JpaRepository<Board, Long> {
 
-    Board findById(Long id);
+    default Board insert(Board board) {
+        return save(board);
+    }
 
-    Board insert(Board board);
+    default void deleteById(Long id) {
+        delete(findById(id).get());
+    }
 
-    void deleteById(Long id);
+    default Board update(Board board) {
+        return save(board);
+    }
 
-    Board update(Board board);
+    default boolean isExist(Long id) {
+        return findById(id).isPresent();
+    }
 }
diff --git a/src/main/java/com/example/demo/repository/BoardRepositoryJdbc.java b/src/main/java/com/example/demo/repository/BoardRepositoryJdbc.java
deleted file mode 100644
index c4fd6f6..0000000
--- a/src/main/java/com/example/demo/repository/BoardRepositoryJdbc.java
+++ /dev/null
@@ -1,72 +0,0 @@
-package com.example.demo.repository;
-
-import java.sql.PreparedStatement;
-import java.util.List;
-
-import org.springframework.jdbc.core.JdbcTemplate;
-import org.springframework.jdbc.core.RowMapper;
-import org.springframework.jdbc.support.GeneratedKeyHolder;
-import org.springframework.jdbc.support.KeyHolder;
-import org.springframework.stereotype.Repository;
-
-import com.example.demo.domain.Board;
-
-@Repository
-public class BoardRepositoryJdbc implements BoardRepository {
-
-    private final JdbcTemplate jdbcTemplate;
-
-    public BoardRepositoryJdbc(JdbcTemplate jdbcTemplate) {
-        this.jdbcTemplate = jdbcTemplate;
-    }
-
-    private static final RowMapper<Board> boardRowMapper = (rs, rowNum) -> new Board(
-        rs.getLong("id"),
-        rs.getString("name")
-    );
-
-    @Override
-    public List<Board> findAll() {
-        return jdbcTemplate.query("""
-            SELECT id, name
-            FROM board
-            """, boardRowMapper);
-    }
-
-    @Override
-    public Board findById(Long id) {
-        return jdbcTemplate.queryForObject("""
-            SELECT id, name
-            FROM board
-            WHERE id = ?
-            """, boardRowMapper, id);
-    }
-
-    @Override
-    public Board insert(Board board) {
-        KeyHolder keyHolder = new GeneratedKeyHolder();
-        jdbcTemplate.update(con -> {
-            PreparedStatement ps = con.prepareStatement("""
-                INSERT INTO board (name) VALUES (?)
-                """, new String[]{"id"});
-            ps.setString(1, board.getName());
-            return ps;
-        }, keyHolder);
-        return findById(keyHolder.getKey().longValue());
-    }
-
-    @Override
-    public void deleteById(Long id) {
-        jdbcTemplate.update("""
-            DELETE FROM board WHERE id = ?
-            """, id);
-    }
-
-    @Override
-    public Board update(Board board) {
-        return jdbcTemplate.queryForObject("""
-            UPDATE board SET name = ? WHERE id = ?
-            """, boardRowMapper, board.getName(), board.getId()
-        );
-    }
-}
diff --git a/src/main/java/com/example/demo/repository/BoardRepositoryMemory.java b/src/main/java/com/example/demo/repository/BoardRepositoryMemory.java
deleted file mode 100644
index 8cf5ecf..0000000
--- a/src/main/java/com/example/demo/repository/BoardRepositoryMemory.java
+++ /dev/null
@@ -1,50 +0,0 @@
-package com.example.demo.repository;
-
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.atomic.AtomicLong;
-
-import com.example.demo.domain.Board;
-
-public class BoardRepositoryMemory implements BoardRepository {
-
-    private static final Map<Long, Board> boards = new HashMap<>();
-    private static final AtomicLong autoincrement = new AtomicLong(1);
-
-    static {
-        // 1번 게시판을 미리 만들어둔다.
-        boards.put(autoincrement.getAndIncrement(), new Board("자유게시판"));
-    }
-
-    @Override
-    public List<Board> findAll() {
-        return boards.entrySet().stream()
-            .map(it -> {
-                Board board = it.getValue();
-                board.setId(it.getKey());
-                return board;
-            }).toList();
-    }
-
-    @Override
-    public Board findById(Long id) {
-        return boards.getOrDefault(id, null);
-    }
-
-    @Override
-    public Board insert(Board board) {
-        boards.put(autoincrement.getAndIncrement(), board);
-        return board;
-    }
-
-    @Override
-    public void deleteById(Long id) {
-        boards.remove(id);
-    }
-
-    @Override
-    public Board update(Board board) {
-        return boards.put(board.getId(), board);
-    }
-}
diff --git a/src/main/java/com/example/demo/repository/MemberRepository.java b/src/main/java/com/example/demo/repository/MemberRepository.java
index 8e2ad14..bb69659 100644
--- a/src/main/java/com/example/demo/repository/MemberRepository.java
+++ b/src/main/java/com/example/demo/repository/MemberRepository.java
@@ -2,17 +2,43 @@
 
 import java.util.List;
 
-import com.example.demo.domain.Member;
+import jakarta.persistence.EntityManager;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.stereotype.Repository;
 
-public interface MemberRepository {
+import com.example.demo.entity.Member;
 
-    List<Member> findAll();
+@Repository
+public interface MemberRepository extends JpaRepository<Member, Long> {
 
-    Member findById(Long id);
+    default Member insert(Member member) {
+        return save(member);
+    }
 
-    Member insert(Member member);
+    default Member update(Member member) {
+        return save(member);
+    }
 
-    Member update(Member member);
+    default void deleteById(Long id) {
+        delete(findById(id).get());
+    }
 
-    void deleteById(Long id);
+    @Query("SELECT p FROM Member p WHERE NOT p.id = :notthis AND p.email = :email")
+    Member findByEmail(Long notthis, String email);
+
+    @Query("SELECT p FROM Member p WHERE p.email = :email AND p.password = :pw")
+    Member findWithLogin(String email, String pw);
+
+    default Boolean isExistEmail(Long notthis, String email) {
+        try{
+            return findByEmail(notthis, email).getEmail().equalsIgnoreCase(email);
+        }catch(Exception e) {
+            return false;
+        }
+    }
+
+    default boolean isExist(Long userid) {
+        return findById(userid).isPresent();
+    }
 }
diff --git a/src/main/java/com/example/demo/repository/MemberRepositoryJdbc.java b/src/main/java/com/example/demo/repository/MemberRepositoryJdbc.java
deleted file mode 100644
index 30d2262..0000000
--- a/src/main/java/com/example/demo/repository/MemberRepositoryJdbc.java
+++ /dev/null
@@ -1,79 +0,0 @@
-package com.example.demo.repository;
-
-import java.sql.PreparedStatement;
-import java.util.List;
-
-import org.springframework.jdbc.core.JdbcTemplate;
-import org.springframework.jdbc.core.RowMapper;
-import org.springframework.jdbc.support.GeneratedKeyHolder;
-import org.springframework.jdbc.support.KeyHolder;
-import org.springframework.stereotype.Repository;
-
-import com.example.demo.domain.Member;
-
-@Repository
-public class MemberRepositoryJdbc implements MemberRepository {
-
-    private final JdbcTemplate jdbcTemplate;
-
-    public MemberRepositoryJdbc(JdbcTemplate jdbcTemplate) {
-        this.jdbcTemplate = jdbcTemplate;
-    }
-
-    private static final RowMapper<Member> memberRowMapper = (rs, rowNum) -> new Member(
-        rs.getLong("id"),
-        rs.getString("name"),
-        rs.getString("email"),
-        rs.getString("password")
-    );
-
-    @Override
-    public List<Member> findAll() {
-        return jdbcTemplate.query("""
-            SELECT id, name, email, password
-            FROM member
-            """, memberRowMapper);
-    }
-
-    @Override
-    public Member findById(Long id) {
-        return jdbcTemplate.queryForObject("""
-            SELECT id, name, email, password
-            FROM member
-            WHERE id = ?
-            """, memberRowMapper, id);
-    }
-
-    @Override
-    public Member insert(Member member) {
-        KeyHolder keyHolder = new GeneratedKeyHolder();
-        jdbcTemplate.update(con -> {
-            PreparedStatement ps = con.prepareStatement("""
-                INSERT INTO member (name, email, password) VALUES (?, ?, ?)
-                """, new String[]{"id"});
-            ps.setString(1, member.getName());
-            ps.setString(2, member.getEmail());
-            ps.setString(3, member.getPassword());
-            return ps;
-        }, keyHolder);
-        return findById(keyHolder.getKey().longValue());
-    }
-
-    @Override
-    public Member update(Member member) {
-        jdbcTemplate.update("""
-            UPDATE member
-            SET name = ?, email = ?
-            WHERE id = ?
-            """, member.getName(), member.getEmail(), member.getId());
-        return findById(member.getId());
-    }
-
-    @Override
-    public void deleteById(Long id) {
-        jdbcTemplate.update("""
-            DELETE FROM member
-            WHERE id = ?
-            """, id);
-    }
-}
diff --git a/src/main/java/com/example/demo/repository/MemberRepositoryMemory.java b/src/main/java/com/example/demo/repository/MemberRepositoryMemory.java
deleted file mode 100644
index b4cf722..0000000
--- a/src/main/java/com/example/demo/repository/MemberRepositoryMemory.java
+++ /dev/null
@@ -1,52 +0,0 @@
-package com.example.demo.repository;
-
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.atomic.AtomicLong;
-
-import com.example.demo.domain.Member;
-
-public class MemberRepositoryMemory implements MemberRepository {
-
-    private static final Map<Long, Member> members = new HashMap<>();
-    private static final AtomicLong autoincrement = new AtomicLong(1);
-
-    static {
-        // 1번 유저를 미리 만들어둔다.
-        members.put(autoincrement.getAndIncrement(), new Member("최준호", "temp@gmail.com", "password"));
-    }
-
-    @Override
-    public List<Member> findAll() {
-        return members.entrySet().stream()
-            .map(it -> {
-                Member member = it.getValue();
-                member.setId(it.getKey());
-                return member;
-            }).toList();
-    }
-
-    @Override
-    public Member findById(Long id) {
-        return members.getOrDefault(id, null);
-    }
-
-    @Override
-    public Member insert(Member member) {
-        long id = autoincrement.getAndIncrement();
-        members.put(id, member);
-        member.setId(id);
-        return member;
-    }
-
-    @Override
-    public Member update(Member member) {
-        return members.put(member.getId(), member);
-    }
-
-    @Override
-    public void deleteById(Long id) {
-        members.remove(id);
-    }
-}
diff --git a/src/main/java/com/example/demo/repository/Repository.java b/src/main/java/com/example/demo/repository/Repository.java
new file mode 100644
index 0000000..75066a1
--- /dev/null
+++ b/src/main/java/com/example/demo/repository/Repository.java
@@ -0,0 +1,30 @@
+package com.example.demo.repository;
+
+import java.util.List;
+
+public class Repository<T> {
+
+    public List<T> findAll() {
+        return null;
+    }
+
+    public T findById(Long id) {
+        return null;
+    }
+
+    public T insert(T entity) {
+        return null;
+    }
+
+    public void deleteById(Long id) {
+    }
+
+    public T update(T entity) {
+        return null;
+    }
+
+    public boolean isExist(Long id) {
+        return false;
+    }
+
+}
diff --git a/src/main/java/com/example/demo/service/ArticleService.java b/src/main/java/com/example/demo/service/ArticleService.java
index 7f8610b..dbf14e5 100644
--- a/src/main/java/com/example/demo/service/ArticleService.java
+++ b/src/main/java/com/example/demo/service/ArticleService.java
@@ -2,18 +2,18 @@
 
 import java.util.List;
 
+import com.example.demo.repository.ArticleRepository;
+import com.example.demo.repository.BoardRepository;
+import com.example.demo.repository.MemberRepository;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
 import com.example.demo.controller.dto.request.ArticleCreateRequest;
 import com.example.demo.controller.dto.response.ArticleResponse;
 import com.example.demo.controller.dto.request.ArticleUpdateRequest;
-import com.example.demo.domain.Article;
-import com.example.demo.domain.Board;
-import com.example.demo.domain.Member;
-import com.example.demo.repository.ArticleRepository;
-import com.example.demo.repository.BoardRepository;
-import com.example.demo.repository.MemberRepository;
+import com.example.demo.entity.Article;
+import com.example.demo.entity.Board;
+import com.example.demo.entity.Member;
 
 @Service
 @Transactional(readOnly = true)
@@ -34,49 +34,57 @@ public ArticleService(
     }
 
     public ArticleResponse getById(Long id) {
-        Article article = articleRepository.findById(id);
-        Member member = memberRepository.findById(article.getAuthorId());
-        Board board = boardRepository.findById(article.getBoardId());
-        return ArticleResponse.of(article, member, board);
+        Article article = articleRepository.findById(id).get();
+        return ArticleResponse.of(article);
     }
 
     public List<ArticleResponse> getByBoardId(Long boardId) {
-        List<Article> articles = articleRepository.findAllByBoardId(boardId);
+        List<Article> articles = boardRepository.findById(boardId).get().getArticles();
         return articles.stream()
-            .map(article -> {
-                Member member = memberRepository.findById(article.getAuthorId());
-                Board board = boardRepository.findById(article.getBoardId());
-                return ArticleResponse.of(article, member, board);
-            })
+            .map(ArticleResponse::of)//인텔리제이가 이렇게 바꿔주더라구요.
             .toList();
     }
 
     @Transactional
     public ArticleResponse create(ArticleCreateRequest request) {
+        Member member = memberRepository.findById(request.authorId()).get();
+        Board board = boardRepository.findById(request.boardId()).get();
         Article article = new Article(
-            request.authorId(),
-            request.boardId(),
+            member,
+            board,
             request.title(),
             request.description()
         );
+        article.convenienceMethod(member, board);
         Article saved = articleRepository.insert(article);
-        Member member = memberRepository.findById(saved.getAuthorId());
-        Board board = boardRepository.findById(saved.getBoardId());
-        return ArticleResponse.of(saved, member, board);
+        return ArticleResponse.of(saved);
+    }
+
+    public boolean isExist(Long id) {
+        return articleRepository.isExist(id);
     }
 
     @Transactional
     public ArticleResponse update(Long id, ArticleUpdateRequest request) {
-        Article article = articleRepository.findById(id);
-        article.update(request.boardId(), request.title(), request.description());
+        Member member = memberRepository.findById(request.authorId()).get();
+        Board board = boardRepository.findById(request.boardId()).get();
+        Article article = articleRepository.findById(id).get();
+        article.update(member, board, request.title(), request.description());
+        article.convenienceMethod(member, board);
         Article updated = articleRepository.update(article);
-        Member member = memberRepository.findById(updated.getAuthorId());
-        Board board = boardRepository.findById(article.getBoardId());
-        return ArticleResponse.of(article, member, board);
+        return ArticleResponse.of(updated);
     }
 
     @Transactional
     public void delete(Long id) {
         articleRepository.deleteById(id);
     }
+
+    public Boolean isExistBoard(Long boardid) {
+        return boardRepository.isExist(boardid);
+    }
+
+    public Boolean isExistUser(Long userid) {
+        return memberRepository.isExist(userid);
+    }
 }
diff --git a/src/main/java/com/example/demo/service/BoardService.java b/src/main/java/com/example/demo/service/BoardService.java
index ffff891..2f4e163 100644
--- a/src/main/java/com/example/demo/service/BoardService.java
+++ b/src/main/java/com/example/demo/service/BoardService.java
@@ -2,14 +2,14 @@
 
 import java.util.List;
 
+import com.example.demo.repository.BoardRepository;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
 import com.example.demo.controller.dto.request.BoardCreateRequest;
 import com.example.demo.controller.dto.request.BoardUpdateRequest;
 import com.example.demo.controller.dto.response.BoardResponse;
-import com.example.demo.domain.Board;
-import com.example.demo.repository.BoardRepository;
+import com.example.demo.entity.Board;
 
 @Service
 @Transactional(readOnly = true)
@@ -28,7 +28,7 @@ public List<BoardResponse> getBoards() {
     }
 
     public BoardResponse getBoardById(Long id) {
-        Board board = boardRepository.findById(id);
+        Board board = boardRepository.findById(id).get();
         return BoardResponse.from(board);
     }
 
@@ -46,9 +46,13 @@ public void deleteBoard(Long id) {
 
     @Transactional
     public BoardResponse update(Long id, BoardUpdateRequest request) {
-        Board board = boardRepository.findById(id);
+        Board board = boardRepository.findById(id).get();
         board.update(request.name());
         Board updated = boardRepository.update(board);
         return BoardResponse.from(updated);
     }
+
+    public boolean isExist(Long id) {
+        return boardRepository.isExist(id);
+    }
 }
diff --git a/src/main/java/com/example/demo/service/LoginService.java b/src/main/java/com/example/demo/service/LoginService.java
new file mode 100644
index 0000000..1c6142d
--- /dev/null
+++ b/src/main/java/com/example/demo/service/LoginService.java
@@ -0,0 +1,51 @@
+package com.example.demo.service;
+
+import com.example.demo.controller.dto.request.MemberCreateRequest;
+import com.example.demo.controller.dto.response.ArticleResponse;
+import com.example.demo.controller.dto.response.MemberResponse;
+import com.example.demo.entity.Article;
+import com.example.demo.entity.Member;
+import com.example.demo.exception.HTTPApiException;
+import com.example.demo.repository.ArticleRepository;
+import com.example.demo.repository.MemberRepository;
+import com.example.demo.util.SHA;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpSession;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.bind.annotation.RequestParam;
+
+import java.util.List;
+
+@Service
+public class LoginService {
+
+    private final MemberRepository memberRepository;
+
+    public LoginService(MemberRepository memberRepository) {
+        this.memberRepository = memberRepository;
+    }
+
+    public Member getMemberWithLogin(String email, String pw) throws HTTPApiException {
+        return memberRepository.findWithLogin(email, SHA.sha3_512(pw));
+    }
+
+    public boolean isExistEmail(String email) {
+        return memberRepository.isExistEmail(-1L, email);
+    }
+
+    @Transactional
+    public void create(MemberCreateRequest request) throws HTTPApiException {
+        Member member = memberRepository.insert(
+                new Member(request.name(), request.email(), SHA.sha3_512(request.password()))
+        );
+    }
+
+    public List<ArticleResponse> getByMemberId(Long memberId) {
+        List<Article> articles = memberRepository.findById(memberId).get().getArticles();
+        return articles.stream()
+                .map(ArticleResponse::of)//인텔리제이가 이렇게 바꿔주더라구요.
+                .toList();
+    }
+
+}
diff --git a/src/main/java/com/example/demo/service/MemberService.java b/src/main/java/com/example/demo/service/MemberService.java
index 04c1bc8..e5b26f9 100644
--- a/src/main/java/com/example/demo/service/MemberService.java
+++ b/src/main/java/com/example/demo/service/MemberService.java
@@ -2,17 +2,20 @@
 
 import java.util.List;
 
+import com.example.demo.entity.Article;
+import com.example.demo.exception.HTTPApiException;
+import com.example.demo.repository.MemberRepository;
+import com.example.demo.util.SHA;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
 import com.example.demo.controller.dto.request.MemberCreateRequest;
 import com.example.demo.controller.dto.request.MemberUpdateRequest;
 import com.example.demo.controller.dto.response.MemberResponse;
-import com.example.demo.domain.Member;
-import com.example.demo.repository.MemberRepository;
+import com.example.demo.entity.Member;
 
 @Service
-@Transactional(readOnly = true)
+//@Transactional(readOnly = true)
 public class MemberService {
 
     private final MemberRepository memberRepository;
@@ -22,7 +25,7 @@ public MemberService(MemberRepository memberRepository) {
     }
 
     public MemberResponse getById(Long id) {
-        Member member = memberRepository.findById(id);
+        Member member = memberRepository.findById(id).get();
         return MemberResponse.from(member);
     }
 
@@ -34,9 +37,9 @@ public List<MemberResponse> getAll() {
     }
 
     @Transactional
-    public MemberResponse create(MemberCreateRequest request) {
+    public MemberResponse create(MemberCreateRequest request) throws HTTPApiException {
         Member member = memberRepository.insert(
-            new Member(request.name(), request.email(), request.password())
+            new Member(request.name(), request.email(), SHA.sha3_512(request.password()))
         );
         return MemberResponse.from(member);
     }
@@ -48,9 +51,17 @@ public void delete(Long id) {
 
     @Transactional
     public MemberResponse update(Long id, MemberUpdateRequest request) {
-        Member member = memberRepository.findById(id);
+        Member member = memberRepository.findById(id).get();
         member.update(request.name(), request.email());
         memberRepository.update(member);
         return MemberResponse.from(member);
     }
+
+    public boolean isExistEmail(Long notthis, String email) {
+        return memberRepository.isExistEmail(notthis, email);
+    }
+
+    public boolean isExistUser(Long userid) {
+        return memberRepository.isExist(userid);
+    }
 }
diff --git a/src/main/java/com/example/demo/util/SHA.java b/src/main/java/com/example/demo/util/SHA.java
new file mode 100644
index 0000000..6b57da1
--- /dev/null
+++ b/src/main/java/com/example/demo/util/SHA.java
@@ -0,0 +1,20 @@
+package com.example.demo.util;
+
+import com.example.demo.exception.ExceptionType;
+import com.example.demo.exception.HTTPApiException;
+import org.apache.tomcat.util.codec.binary.Base64;
+
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+
+public class SHA {
+    public static String sha3_512(String text) throws HTTPApiException {
+        try{
+            MessageDigest md = MessageDigest.getInstance("SHA3-512");
+            md.update(text.getBytes(StandardCharsets.UTF_8));
+            return Base64.encodeBase64String(md.digest());
+        }catch(Exception e) {
+            throw new HTTPApiException(ExceptionType.Server_Error);
+        }
+    }
+}
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index ff69a9e..e034a0b 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -2,5 +2,5 @@ spring:
   datasource:
     url: jdbc:mysql://localhost:3306/bcsd # 본인의 환경에 맞게 수정한다.
     username: root # 본인의 환경에 맞게 수정한다.
-    password: qwer1234 # 본인의 환경에 맞게 수정한다.
+    password: 1234 # 본인의 환경에 맞게 수정한다.
     driver-class-name: com.mysql.cj.jdbc.Driver
diff --git a/src/main/resources/templates/login.html b/src/main/resources/templates/login.html
new file mode 100644
index 0000000..707768e
--- /dev/null
+++ b/src/main/resources/templates/login.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Login</title>
+</head>
+<body>
+<h2>Login form</h2>
+<form action="login" method="post">
+    <label for="email">Email:</label>
+    <input type="text" id="email" name="email"><br><br>
+    <label for="password">Password:</label>
+    <input type="password" id="password" name="password"><br><br>
+    <input type="submit" value="Login">
+</form>
+</body>
+</html>
\ No newline at end of file
diff --git a/src/main/resources/templates/showmethearticles.html b/src/main/resources/templates/showmethearticles.html
new file mode 100644
index 0000000..8ec708e
--- /dev/null
+++ b/src/main/resources/templates/showmethearticles.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>My Articles</title>
+</head>
+<body>
+<h1>My Articles</h1>
+<h th:each="article : ${articles}">
+    <h2 th:text="${article.title()}">title</h2>
+    <h3 th:text="${article.description()}">content</h3>
+    <h4 th:text="${article.createdDate()}">created</h4><h4 th:text="${article.modifiedDate()}">edited</h4><br>
+</h>
+</body>
+</html>
\ No newline at end of file
diff --git a/src/main/resources/templates/sign.html b/src/main/resources/templates/sign.html
new file mode 100644
index 0000000..8bf8591
--- /dev/null
+++ b/src/main/resources/templates/sign.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Sign</title>
+</head>
+<body>
+<h2>Sign form</h2>
+<form action="sign" method="post">
+    <label for="name">Name:</label>
+    <input type="text" id="name" name="name"><br><br>
+    <label for="email">Email:</label>
+    <input type="text" id="email" name="email"><br><br>
+    <label for="password">Password:</label>
+    <input type="password" id="password" name="password"><br><br>
+    <input type="submit" value="Sign">
+</form>
+</body>
+</html>
\ No newline at end of file