diff --git a/src/main/java/com/neighbors/tohero/application/baseResponse/BaseResponseMessage.java b/src/main/java/com/neighbors/tohero/application/baseResponse/BaseResponseMessage.java
index bf8802f..a838556 100644
--- a/src/main/java/com/neighbors/tohero/application/baseResponse/BaseResponseMessage.java
+++ b/src/main/java/com/neighbors/tohero/application/baseResponse/BaseResponseMessage.java
@@ -25,6 +25,8 @@ public enum BaseResponseMessage {
     이메일_형식이_올바르지_못합니다("이메일 형식이 올바르지 못합니다"),
     유저가_성공적으로_인증되었습니다("유저가 성공적으로 인증되었습니다"),
     GUEST_유저_토큰이_정상적으로_생성되었습니다("GUEST 유저 토큰이 정상적으로 생성되었습니다"),
+    로그아웃이_성공적으로_실행되었습니다("로그아웃이 성공적으로 실행되었습니다"),
+    성공적으로_탈퇴했습니다("성공적으로 탈퇴했습니다"),
 
     //jwt error message
     JWT_토큰_오류입니다("JWT 토큰 오류입니다"),
@@ -43,7 +45,13 @@ public enum BaseResponseMessage {
 
     //letter
     편지가_성공적으로_생성_되었습니다("편지가 성공적으로 생성 되었습니다"),
-    편지_생성이_실패_했습니다("편지 생성이 실패했습니다");
+    편지_생성이_실패_했습니다("편지 생성이 실패했습니다"),
+    편지가_성공적으로_조회되었습니다("편지가 성공적으로 조회되었습니다"),
+    일치하는_편지가_없습니다("일치하는 편지가 없습니다"),
+
+    //news
+    뉴스_조회가_성공했습니다("뉴스 조회가 성공했습니다"),
+    뉴스_조회가_실패했습니다("뉴스 조회가 실패했습니다");
 
     private final String message;
 
diff --git a/src/main/java/com/neighbors/tohero/application/letter/dto/GetLetterDetailRequest.java b/src/main/java/com/neighbors/tohero/application/letter/dto/GetLetterDetailRequest.java
new file mode 100644
index 0000000..f96044d
--- /dev/null
+++ b/src/main/java/com/neighbors/tohero/application/letter/dto/GetLetterDetailRequest.java
@@ -0,0 +1,9 @@
+package com.neighbors.tohero.application.letter.dto;
+
+import jakarta.validation.constraints.NotNull;
+
+public record GetLetterDetailRequest(
+        @NotNull
+        long letterId
+) {
+}
diff --git a/src/main/java/com/neighbors/tohero/application/letter/dto/GetLetterDetailResponse.java b/src/main/java/com/neighbors/tohero/application/letter/dto/GetLetterDetailResponse.java
new file mode 100644
index 0000000..cfe3197
--- /dev/null
+++ b/src/main/java/com/neighbors/tohero/application/letter/dto/GetLetterDetailResponse.java
@@ -0,0 +1,18 @@
+package com.neighbors.tohero.application.letter.dto;
+
+import com.neighbors.tohero.domain.domain.mainPage.model.Letter;
+
+public record GetLetterDetailResponse(
+        LetterInfo letterInfo
+) {
+    public record LetterInfo(
+        long letterId,
+        String content,
+        String from,
+        String to
+    ){}
+
+    public static GetLetterDetailResponse from(Letter letter) {
+        return new GetLetterDetailResponse(new LetterInfo(letter.getLetterId(), letter.getLetterContent(), letter.getWriter(), letter.getTargetName()));
+    }
+}
diff --git a/src/main/java/com/neighbors/tohero/application/letter/service/LetterService.java b/src/main/java/com/neighbors/tohero/application/letter/service/LetterService.java
index 1fdf98c..3901e66 100644
--- a/src/main/java/com/neighbors/tohero/application/letter/service/LetterService.java
+++ b/src/main/java/com/neighbors/tohero/application/letter/service/LetterService.java
@@ -5,12 +5,16 @@
 import com.neighbors.tohero.application.baseResponse.BaseResponseStatus;
 import com.neighbors.tohero.application.letter.dto.CreateLetterRequest;
 import com.neighbors.tohero.application.letter.dto.CreateLetterResponse;
+import com.neighbors.tohero.application.letter.dto.GetLetterDetailRequest;
+import com.neighbors.tohero.application.letter.dto.GetLetterDetailResponse;
 import com.neighbors.tohero.common.enums.Role;
 import com.neighbors.tohero.common.exception.address.AddressException;
 import com.neighbors.tohero.common.exception.letter.LetterException;
 import com.neighbors.tohero.common.jwt.JwtUserDetails;
 import com.neighbors.tohero.domain.domain.address.service.GetAddress;
 import com.neighbors.tohero.domain.domain.letter.service.CreateLetter;
+import com.neighbors.tohero.domain.domain.mainPage.model.Letter;
+import com.neighbors.tohero.domain.domain.mainPage.service.GetLetter;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 
@@ -22,6 +26,7 @@
 public class LetterService {
 
     private final CreateLetter createLetter;
+    private final GetLetter getLetter;
     private final GetAddress getAddress;
 
     public BaseResponse<CreateLetterResponse> createLetter(final JwtUserDetails jwtUserDetail, final CreateLetterRequest createLetterRequest) {
@@ -46,6 +51,16 @@ public BaseResponse<CreateLetterResponse> createLetter(final JwtUserDetails jwtU
         );
     }
 
+    public BaseResponse<GetLetterDetailResponse> getLetterDetail(GetLetterDetailRequest getLetterDetailRequest){
+        Letter matchedLetter = getLetter.getLetterById(getLetterDetailRequest.letterId());
+
+        return new BaseResponse<>(
+                BaseResponseStatus.OK,
+                BaseResponseMessage.편지가_성공적으로_조회되었습니다.getMessage(),
+                GetLetterDetailResponse.from(matchedLetter)
+        );
+    }
+
     private BaseResponse<CreateLetterResponse> createGuestLetter(final String nickname, final CreateLetterRequest createLetterRequest) {
         long createdLetterId = createLetter.createGuestLetter(
                 nickname,
diff --git a/src/main/java/com/neighbors/tohero/application/news/dto/GetPagedNewsResponse.java b/src/main/java/com/neighbors/tohero/application/news/dto/GetPagedNewsResponse.java
new file mode 100644
index 0000000..07d9fe0
--- /dev/null
+++ b/src/main/java/com/neighbors/tohero/application/news/dto/GetPagedNewsResponse.java
@@ -0,0 +1,26 @@
+package com.neighbors.tohero.application.news.dto;
+
+import com.neighbors.tohero.domain.domain.news.model.News;
+
+import java.util.List;
+
+public record GetPagedNewsResponse(
+        List<NewsInfo> newsInfos
+) {
+    public record NewsInfo(
+            long newsId,
+            String title,
+            String content
+    ){
+        public static NewsInfo from(News news){
+            return new NewsInfo(news.getNewsId(), news.getTitle(), news.getContent());
+        }
+    }
+
+    public static GetPagedNewsResponse from(List<News> newsInfos) {
+        List<NewsInfo> newsInfoList = newsInfos.stream()
+                .map(NewsInfo::from)
+                .toList();
+        return new GetPagedNewsResponse(newsInfoList);
+    }
+}
diff --git a/src/main/java/com/neighbors/tohero/application/news/service/NewsService.java b/src/main/java/com/neighbors/tohero/application/news/service/NewsService.java
new file mode 100644
index 0000000..a2d6cbe
--- /dev/null
+++ b/src/main/java/com/neighbors/tohero/application/news/service/NewsService.java
@@ -0,0 +1,30 @@
+package com.neighbors.tohero.application.news.service;
+
+import com.neighbors.tohero.application.baseResponse.BaseResponse;
+import com.neighbors.tohero.application.baseResponse.BaseResponseMessage;
+import com.neighbors.tohero.application.baseResponse.BaseResponseStatus;
+import com.neighbors.tohero.application.news.dto.GetPagedNewsResponse;
+import com.neighbors.tohero.domain.domain.news.model.News;
+import com.neighbors.tohero.domain.domain.news.service.GetNews;
+import lombok.RequiredArgsConstructor;
+import org.springframework.data.domain.Pageable;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+@RequiredArgsConstructor
+public class NewsService {
+
+    private final GetNews getNews;
+
+    public BaseResponse<GetPagedNewsResponse> getPagedNews(Pageable pageable){
+        List<News> news = getNews.getPagedNews(pageable);
+
+        return new BaseResponse<>(
+                BaseResponseStatus.OK,
+                BaseResponseMessage.뉴스_조회가_성공했습니다.getMessage(),
+                GetPagedNewsResponse.from(news)
+        );
+    }
+}
diff --git a/src/main/java/com/neighbors/tohero/application/user/service/UserService.java b/src/main/java/com/neighbors/tohero/application/user/service/UserService.java
index 5cf626e..3ff2cc9 100644
--- a/src/main/java/com/neighbors/tohero/application/user/service/UserService.java
+++ b/src/main/java/com/neighbors/tohero/application/user/service/UserService.java
@@ -11,7 +11,9 @@
 import com.neighbors.tohero.common.jwt.JwtUserDetails;
 import com.neighbors.tohero.domain.domain.user.model.User;
 import com.neighbors.tohero.domain.domain.user.service.CreateUser;
+import com.neighbors.tohero.domain.domain.user.service.DeleteUser;
 import com.neighbors.tohero.domain.domain.user.service.UpdateUser;
+import jakarta.servlet.http.HttpSession;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 
@@ -21,6 +23,7 @@ public class UserService {
 
     private final UpdateUser updateUser;
     private final CreateUser createUser;
+    private final DeleteUser deleteUser;
     private final JwtProvider jwtProvider;
 
     public BaseResponse updateUserName(long userId, String nickname){
@@ -39,6 +42,26 @@ public BaseResponse<AuthenticateUserResponse> authenticateUser(AuthenticateUserR
         return returnGuestUserToken(authenticateUserRequest);
     }
 
+    public BaseResponse logout(HttpSession httpSession){
+        //todo : Redis record 삭제
+        httpSession.invalidate();
+        return new BaseResponse<>(
+                BaseResponseStatus.OK,
+                BaseResponseMessage.로그아웃이_성공적으로_실행되었습니다.getMessage()
+        );
+    }
+
+    public BaseResponse signout(JwtUserDetails jwtUserDetails, HttpSession httpSession){
+        httpSession.invalidate();
+
+        deleteUser.signout(jwtUserDetails.getUserId());
+
+        return new BaseResponse<>(
+                BaseResponseStatus.OK,
+                BaseResponseMessage.성공적으로_탈퇴했습니다.getMessage()
+        );
+    }
+
     private BaseResponse<AuthenticateUserResponse> returnLoginedUserToken(AuthenticateUserRequest authenticateUserRequest) {
         User createdUser = createUser.createUser(User.toEntity(authenticateUserRequest));
         AuthTokens authTokens = jwtProvider.createToken(JwtUserDetails.from(createdUser));
diff --git a/src/main/java/com/neighbors/tohero/common/config/SecurityConfig.java b/src/main/java/com/neighbors/tohero/common/config/SecurityConfig.java
index 276f762..904afd1 100644
--- a/src/main/java/com/neighbors/tohero/common/config/SecurityConfig.java
+++ b/src/main/java/com/neighbors/tohero/common/config/SecurityConfig.java
@@ -46,7 +46,9 @@ public WebSecurityCustomizer webSecurityCustomizer() {
                 "/auth/refreshToken",
                 "/address",
                 "/notice/**",
-                "/mainPage/**"
+                "/mainPage/**",
+                "/letter/detail",
+                "/news"
         );
     }
 
@@ -64,7 +66,10 @@ SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
                 {
                     exception.authenticationEntryPoint(customJwtAuthenticationEntryPoint);
                     exception.accessDeniedHandler(customAccessDeniedHandler);
-                });
+                })
+                .authorizeHttpRequests(auth -> auth
+                        .anyRequest().authenticated()
+                );
 
         return http.build();
     }
diff --git a/src/main/java/com/neighbors/tohero/common/exception/address/AddressException.java b/src/main/java/com/neighbors/tohero/common/exception/address/AddressException.java
index 3a9c034..4c09642 100644
--- a/src/main/java/com/neighbors/tohero/common/exception/address/AddressException.java
+++ b/src/main/java/com/neighbors/tohero/common/exception/address/AddressException.java
@@ -1,7 +1,9 @@
 package com.neighbors.tohero.common.exception.address;
 
 import com.neighbors.tohero.application.baseResponse.BaseResponseStatus;
+import lombok.Getter;
 
+@Getter
 public class AddressException extends RuntimeException{
     private final BaseResponseStatus status;
     private final String message;
diff --git a/src/main/java/com/neighbors/tohero/common/exception/letter/LetterException.java b/src/main/java/com/neighbors/tohero/common/exception/letter/LetterException.java
index 061397f..503db16 100644
--- a/src/main/java/com/neighbors/tohero/common/exception/letter/LetterException.java
+++ b/src/main/java/com/neighbors/tohero/common/exception/letter/LetterException.java
@@ -1,7 +1,9 @@
 package com.neighbors.tohero.common.exception.letter;
 
 import com.neighbors.tohero.application.baseResponse.BaseResponseStatus;
+import lombok.Getter;
 
+@Getter
 public class LetterException extends RuntimeException {
 
     private final BaseResponseStatus status;
diff --git a/src/main/java/com/neighbors/tohero/common/exception/news/NewsException.java b/src/main/java/com/neighbors/tohero/common/exception/news/NewsException.java
new file mode 100644
index 0000000..5dfb009
--- /dev/null
+++ b/src/main/java/com/neighbors/tohero/common/exception/news/NewsException.java
@@ -0,0 +1,17 @@
+package com.neighbors.tohero.common.exception.news;
+
+import com.neighbors.tohero.application.baseResponse.BaseResponseStatus;
+import lombok.Getter;
+
+@Getter
+public class NewsException extends RuntimeException {
+
+    private final BaseResponseStatus status;
+    private final String message;
+
+    public NewsException(BaseResponseStatus status, String message) {
+        super(message);
+        this.status = status;
+        this.message = message;
+    }
+}
diff --git a/src/main/java/com/neighbors/tohero/common/exception/notice/NoticeException.java b/src/main/java/com/neighbors/tohero/common/exception/notice/NoticeException.java
index c32cfdd..d7ae867 100644
--- a/src/main/java/com/neighbors/tohero/common/exception/notice/NoticeException.java
+++ b/src/main/java/com/neighbors/tohero/common/exception/notice/NoticeException.java
@@ -1,7 +1,9 @@
 package com.neighbors.tohero.common.exception.notice;
 
 import com.neighbors.tohero.application.baseResponse.BaseResponseStatus;
+import lombok.Getter;
 
+@Getter
 public class NoticeException extends RuntimeException {
 
     private final BaseResponseStatus status;
diff --git a/src/main/java/com/neighbors/tohero/domain/domain/mainPage/service/GetLetter.java b/src/main/java/com/neighbors/tohero/domain/domain/mainPage/service/GetLetter.java
index d82310d..4a31fa5 100644
--- a/src/main/java/com/neighbors/tohero/domain/domain/mainPage/service/GetLetter.java
+++ b/src/main/java/com/neighbors/tohero/domain/domain/mainPage/service/GetLetter.java
@@ -21,4 +21,8 @@ public long getTotalLetterNumber(){
     public List<Letter> getPageableLetter(Pageable pageable){
         return letterRepository.getPageableLetter(pageable);
     }
+
+    public Letter getLetterById(long letterId){
+        return letterRepository.getLetter(repo -> repo.findByIdAndPublic(letterId));
+    }
 }
diff --git a/src/main/java/com/neighbors/tohero/domain/domain/news/model/News.java b/src/main/java/com/neighbors/tohero/domain/domain/news/model/News.java
new file mode 100644
index 0000000..da0dce9
--- /dev/null
+++ b/src/main/java/com/neighbors/tohero/domain/domain/news/model/News.java
@@ -0,0 +1,16 @@
+package com.neighbors.tohero.domain.domain.news.model;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public class News {
+    private long newsId;
+    private String title;
+    private String content;
+
+    public static News of(long newsId, String title, String content) {
+        return new News(newsId, title, content);
+    }
+}
diff --git a/src/main/java/com/neighbors/tohero/domain/domain/news/service/GetNews.java b/src/main/java/com/neighbors/tohero/domain/domain/news/service/GetNews.java
new file mode 100644
index 0000000..bd0ba71
--- /dev/null
+++ b/src/main/java/com/neighbors/tohero/domain/domain/news/service/GetNews.java
@@ -0,0 +1,20 @@
+package com.neighbors.tohero.domain.domain.news.service;
+
+import com.neighbors.tohero.common.annotaion.DomainService;
+import com.neighbors.tohero.domain.domain.news.model.News;
+import com.neighbors.tohero.domain.query.NewsRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.data.domain.Pageable;
+
+import java.util.List;
+
+@DomainService
+@RequiredArgsConstructor
+public class GetNews {
+
+    private final NewsRepository newsRepository;
+
+    public List<News> getPagedNews(Pageable pageable){
+        return newsRepository.getNewsList(repo -> repo.findAllByPagable(pageable));
+    }
+}
diff --git a/src/main/java/com/neighbors/tohero/domain/domain/user/service/DeleteUser.java b/src/main/java/com/neighbors/tohero/domain/domain/user/service/DeleteUser.java
new file mode 100644
index 0000000..30c4bc5
--- /dev/null
+++ b/src/main/java/com/neighbors/tohero/domain/domain/user/service/DeleteUser.java
@@ -0,0 +1,19 @@
+package com.neighbors.tohero.domain.domain.user.service;
+
+import com.neighbors.tohero.common.annotaion.DomainService;
+import com.neighbors.tohero.domain.query.LetterRepository;
+import com.neighbors.tohero.domain.query.UserRepository;
+import lombok.RequiredArgsConstructor;
+
+@DomainService
+@RequiredArgsConstructor
+public class DeleteUser {
+
+    private final UserRepository userRepository;
+    private final LetterRepository letterRepository;
+
+    public void signout(long userId){
+        letterRepository.remainLetterWithoutUser(userId);
+        userRepository.deleteUser(repo -> repo.deleteById(userId));
+    }
+}
diff --git a/src/main/java/com/neighbors/tohero/domain/query/LetterRepository.java b/src/main/java/com/neighbors/tohero/domain/query/LetterRepository.java
index 9694185..b035974 100644
--- a/src/main/java/com/neighbors/tohero/domain/query/LetterRepository.java
+++ b/src/main/java/com/neighbors/tohero/domain/query/LetterRepository.java
@@ -1,13 +1,19 @@
 package com.neighbors.tohero.domain.query;
 
 import com.neighbors.tohero.domain.domain.mainPage.model.Letter;
+import com.neighbors.tohero.infrastructure.entity.LetterEntity;
+import com.neighbors.tohero.infrastructure.repository.LetterEntityRepository;
 import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Repository;
 
 import java.util.List;
+import java.util.Optional;
+import java.util.function.Function;
 
 public interface LetterRepository {
     long getTotalLetterNumber();
     List<Letter> getPageableLetter(Pageable pageable);
     Letter createLetter(Letter letter);
+    void remainLetterWithoutUser(long userId);
+    Letter getLetter(Function<LetterEntityRepository, Optional<LetterEntity>> function);
 }
diff --git a/src/main/java/com/neighbors/tohero/domain/query/NewsRepository.java b/src/main/java/com/neighbors/tohero/domain/query/NewsRepository.java
new file mode 100644
index 0000000..292f372
--- /dev/null
+++ b/src/main/java/com/neighbors/tohero/domain/query/NewsRepository.java
@@ -0,0 +1,13 @@
+package com.neighbors.tohero.domain.query;
+
+import com.neighbors.tohero.domain.domain.news.model.News;
+import com.neighbors.tohero.infrastructure.entity.NewsEntity;
+import com.neighbors.tohero.infrastructure.repository.NewsEntityRepository;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.function.Function;
+
+public interface NewsRepository {
+    public List<News> getNewsList(Function<NewsEntityRepository, Optional<List<NewsEntity>>> function);
+}
diff --git a/src/main/java/com/neighbors/tohero/domain/query/UserRepository.java b/src/main/java/com/neighbors/tohero/domain/query/UserRepository.java
index eb02c8c..9e767e7 100644
--- a/src/main/java/com/neighbors/tohero/domain/query/UserRepository.java
+++ b/src/main/java/com/neighbors/tohero/domain/query/UserRepository.java
@@ -5,10 +5,12 @@
 import com.neighbors.tohero.infrastructure.repository.UserEntityRepository;
 
 import java.util.Optional;
+import java.util.function.Consumer;
 import java.util.function.Function;
 
 public interface UserRepository {
     User createUser(User user);
     User updateUserName(Function<UserEntityRepository, Optional<UserEntity>> findUserFunction, String nickname);
     User getUser(Function<UserEntityRepository, Optional<UserEntity>> findUserFunction);
+    void deleteUser(Consumer<UserEntityRepository> findUserConsumer);
 }
diff --git a/src/main/java/com/neighbors/tohero/infrastructure/entity/LetterEntity.java b/src/main/java/com/neighbors/tohero/infrastructure/entity/LetterEntity.java
index 54b672d..17becb6 100644
--- a/src/main/java/com/neighbors/tohero/infrastructure/entity/LetterEntity.java
+++ b/src/main/java/com/neighbors/tohero/infrastructure/entity/LetterEntity.java
@@ -45,4 +45,9 @@ public class LetterEntity extends BaseEntity {
 
     @Column(name = "reading_alarm")
     private Boolean readingAlarm;
+
+    public void remainLetterWithoutUser(){
+        this.user = null;
+        this.isPublic = false;
+    }
 }
diff --git a/src/main/java/com/neighbors/tohero/infrastructure/entity/NewsEntity.java b/src/main/java/com/neighbors/tohero/infrastructure/entity/NewsEntity.java
new file mode 100644
index 0000000..2e7370e
--- /dev/null
+++ b/src/main/java/com/neighbors/tohero/infrastructure/entity/NewsEntity.java
@@ -0,0 +1,21 @@
+package com.neighbors.tohero.infrastructure.entity;
+
+import com.neighbors.tohero.infrastructure.entity.base.BaseEntity;
+import jakarta.persistence.*;
+import lombok.Getter;
+
+@Entity
+@Table(name = "`News`")
+@Getter
+public class NewsEntity extends BaseEntity {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "news_id")
+    long newsId;
+
+    @Column(name = "news_title")
+    String newsTitle;
+
+    @Column(name = "news_content")
+    String newsContent;
+}
diff --git a/src/main/java/com/neighbors/tohero/infrastructure/mapper/NewsMapper.java b/src/main/java/com/neighbors/tohero/infrastructure/mapper/NewsMapper.java
new file mode 100644
index 0000000..a4c065c
--- /dev/null
+++ b/src/main/java/com/neighbors/tohero/infrastructure/mapper/NewsMapper.java
@@ -0,0 +1,13 @@
+package com.neighbors.tohero.infrastructure.mapper;
+
+import com.neighbors.tohero.domain.domain.news.model.News;
+import com.neighbors.tohero.infrastructure.entity.NewsEntity;
+import org.springframework.stereotype.Component;
+
+@Component
+public class NewsMapper {
+
+    public News toDomain(NewsEntity newsEntity) {
+        return News.of(newsEntity.getNewsId(), newsEntity.getNewsTitle(), newsEntity.getNewsContent());
+    }
+}
diff --git a/src/main/java/com/neighbors/tohero/infrastructure/query/impl/LetterRepositoryImpl.java b/src/main/java/com/neighbors/tohero/infrastructure/query/impl/LetterRepositoryImpl.java
index 912bd49..a85ee0c 100644
--- a/src/main/java/com/neighbors/tohero/infrastructure/query/impl/LetterRepositoryImpl.java
+++ b/src/main/java/com/neighbors/tohero/infrastructure/query/impl/LetterRepositoryImpl.java
@@ -1,5 +1,8 @@
 package com.neighbors.tohero.infrastructure.query.impl;
 
+import com.neighbors.tohero.application.baseResponse.BaseResponseMessage;
+import com.neighbors.tohero.application.baseResponse.BaseResponseStatus;
+import com.neighbors.tohero.common.exception.letter.LetterException;
 import com.neighbors.tohero.domain.domain.mainPage.model.Letter;
 import com.neighbors.tohero.domain.query.LetterRepository;
 import com.neighbors.tohero.infrastructure.entity.LetterEntity;
@@ -10,6 +13,8 @@
 import org.springframework.stereotype.Repository;
 
 import java.util.List;
+import java.util.Optional;
+import java.util.function.Function;
 
 @Repository
 @RequiredArgsConstructor
@@ -38,4 +43,24 @@ public Letter createLetter(Letter letter) {
         LetterEntity createdLetterEntity =  letterEntityRepository.save(newLetterEntity);
         return letterMapper.toDomain(createdLetterEntity);
     }
+
+    @Override
+    public void remainLetterWithoutUser(long userId) {
+        letterEntityRepository.findAllByUserId(userId)
+                .forEach(letter -> {
+                    letter.remainLetterWithoutUser();
+                    letterEntityRepository.save(letter);
+                });
+    }
+
+    @Override
+    public Letter getLetter(Function<LetterEntityRepository, Optional<LetterEntity>> function) {
+        LetterEntity letterEntity = function.apply(letterEntityRepository)
+                .orElseThrow(()-> new LetterException(
+                        BaseResponseStatus.NO_RESULT,
+                        BaseResponseMessage.일치하는_편지가_없습니다.getMessage()
+                ));
+
+        return letterMapper.toDomain(letterEntity);
+    }
 }
diff --git a/src/main/java/com/neighbors/tohero/infrastructure/query/impl/NewsRepositoryImpl.java b/src/main/java/com/neighbors/tohero/infrastructure/query/impl/NewsRepositoryImpl.java
new file mode 100644
index 0000000..2ba03af
--- /dev/null
+++ b/src/main/java/com/neighbors/tohero/infrastructure/query/impl/NewsRepositoryImpl.java
@@ -0,0 +1,38 @@
+package com.neighbors.tohero.infrastructure.query.impl;
+
+import com.neighbors.tohero.application.baseResponse.BaseResponseMessage;
+import com.neighbors.tohero.application.baseResponse.BaseResponseStatus;
+import com.neighbors.tohero.common.exception.news.NewsException;
+import com.neighbors.tohero.domain.domain.news.model.News;
+import com.neighbors.tohero.domain.query.NewsRepository;
+import com.neighbors.tohero.infrastructure.entity.NewsEntity;
+import com.neighbors.tohero.infrastructure.mapper.NewsMapper;
+import com.neighbors.tohero.infrastructure.repository.NewsEntityRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Repository;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.function.Function;
+
+@Repository
+@RequiredArgsConstructor
+public class NewsRepositoryImpl implements NewsRepository {
+
+    private final NewsEntityRepository newsEntityRepository;
+    private final NewsMapper newsMapper;
+
+    @Override
+    public List<News> getNewsList(Function<NewsEntityRepository, Optional<List<NewsEntity>>> function) {
+        List<NewsEntity> newsEntities = function.apply(newsEntityRepository)
+                .orElseThrow(()-> new NewsException(
+                        BaseResponseStatus.NO_RESULT,
+                        BaseResponseMessage.뉴스_조회가_실패했습니다.getMessage()
+                ));
+
+        return newsEntities.stream()
+                .map(newsMapper::toDomain)
+                .toList();
+    }
+}
diff --git a/src/main/java/com/neighbors/tohero/infrastructure/query/impl/UserRepositoryImpl.java b/src/main/java/com/neighbors/tohero/infrastructure/query/impl/UserRepositoryImpl.java
index 8b98412..4256d4f 100644
--- a/src/main/java/com/neighbors/tohero/infrastructure/query/impl/UserRepositoryImpl.java
+++ b/src/main/java/com/neighbors/tohero/infrastructure/query/impl/UserRepositoryImpl.java
@@ -12,6 +12,7 @@
 import org.springframework.stereotype.Repository;
 
 import java.util.Optional;
+import java.util.function.Consumer;
 import java.util.function.Function;
 
 @Repository
@@ -61,4 +62,9 @@ public User getUser(Function<UserEntityRepository, Optional<UserEntity>> findUse
 
         return userMapper.toDomain(userEntity);
     }
+
+    @Override
+    public void deleteUser(Consumer<UserEntityRepository> findUserConsumer) {
+        findUserConsumer.accept(userEntityRepository);
+    }
 }
diff --git a/src/main/java/com/neighbors/tohero/infrastructure/repository/LetterEntityRepository.java b/src/main/java/com/neighbors/tohero/infrastructure/repository/LetterEntityRepository.java
index 8131bc0..d6caeaa 100644
--- a/src/main/java/com/neighbors/tohero/infrastructure/repository/LetterEntityRepository.java
+++ b/src/main/java/com/neighbors/tohero/infrastructure/repository/LetterEntityRepository.java
@@ -1,18 +1,28 @@
 package com.neighbors.tohero.infrastructure.repository;
 
 import com.neighbors.tohero.infrastructure.entity.LetterEntity;
+import io.lettuce.core.dynamic.annotation.Param;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Slice;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.stereotype.Repository;
 
+import java.util.List;
+import java.util.Optional;
+
 @Repository
 public interface LetterEntityRepository extends JpaRepository<LetterEntity, Long> {
 
-    @Query("SELECT n FROM LetterEntity n WHERE n.isPublic = true")
+    @Query("SELECT le FROM LetterEntity le WHERE le.isPublic = true")
     Slice<LetterEntity> findPagedLetterEntity(Pageable pageable);
 
-    @Query("SELECT COUNT(n) FROM LetterEntity n WHERE n.isPublic = true")
+    @Query("SELECT COUNT(le) FROM LetterEntity le WHERE le.isPublic = true")
     long countPublicLetter();
+
+    @Query("SELECT le FROM LetterEntity le WHERE le.user.userId = :userId")
+    List<LetterEntity> findAllByUserId(@Param("userId") Long userId);
+
+    @Query("SELECT le FROM LetterEntity le WHERE le.letterId = :letterId AND le.isPublic = true")
+    Optional<LetterEntity> findByIdAndPublic(@Param("letterId") long letterId);
 }
diff --git a/src/main/java/com/neighbors/tohero/infrastructure/repository/NewsEntityRepository.java b/src/main/java/com/neighbors/tohero/infrastructure/repository/NewsEntityRepository.java
new file mode 100644
index 0000000..090f3df
--- /dev/null
+++ b/src/main/java/com/neighbors/tohero/infrastructure/repository/NewsEntityRepository.java
@@ -0,0 +1,14 @@
+package com.neighbors.tohero.infrastructure.repository;
+
+import com.neighbors.tohero.infrastructure.entity.NewsEntity;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface NewsEntityRepository extends JpaRepository<NewsEntity, Long> {
+    @Query("SELECT ne FROM NewsEntity ne")
+    Optional<List<NewsEntity>> findAllByPagable(Pageable pageable);
+}
diff --git a/src/main/java/com/neighbors/tohero/presentation/controller/LetterController.java b/src/main/java/com/neighbors/tohero/presentation/controller/LetterController.java
index 7a36697..e8c6f92 100644
--- a/src/main/java/com/neighbors/tohero/presentation/controller/LetterController.java
+++ b/src/main/java/com/neighbors/tohero/presentation/controller/LetterController.java
@@ -2,26 +2,25 @@
 
 import com.neighbors.tohero.application.baseResponse.BaseResponse;
 import com.neighbors.tohero.application.letter.dto.CreateLetterRequest;
+import com.neighbors.tohero.application.letter.dto.GetLetterDetailRequest;
 import com.neighbors.tohero.application.letter.service.LetterService;
 import com.neighbors.tohero.common.jwt.JwtUserDetails;
 import io.swagger.v3.oas.annotations.Parameter;
 import lombok.RequiredArgsConstructor;
+import org.springdoc.core.annotations.ParameterObject;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
 import org.springframework.validation.annotation.Validated;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestBody;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
 @RestController
 @RequiredArgsConstructor
-@RequestMapping("")
+@RequestMapping("/letter")
 public class LetterController {
 
     private final LetterService letterService;
 
-    @PostMapping("/letter")
+    @PostMapping("")
     public ResponseEntity<BaseResponse> createLetter(
             @Parameter(hidden=true) @AuthenticationPrincipal JwtUserDetails jwtUserDetail,
             @RequestBody @Validated CreateLetterRequest createLetterRequest
@@ -29,4 +28,10 @@ public ResponseEntity<BaseResponse> createLetter(
         return ResponseEntity.ok()
                 .body(letterService.createLetter(jwtUserDetail, createLetterRequest));
     }
+
+    @GetMapping("/detail")
+    public ResponseEntity<BaseResponse> getLetterDetail(@ParameterObject GetLetterDetailRequest getLetterDetailRequest){
+        return ResponseEntity.ok()
+                .body(letterService.getLetterDetail(getLetterDetailRequest));
+    }
 }
diff --git a/src/main/java/com/neighbors/tohero/presentation/controller/NewsController.java b/src/main/java/com/neighbors/tohero/presentation/controller/NewsController.java
new file mode 100644
index 0000000..26c0862
--- /dev/null
+++ b/src/main/java/com/neighbors/tohero/presentation/controller/NewsController.java
@@ -0,0 +1,26 @@
+package com.neighbors.tohero.presentation.controller;
+
+import com.neighbors.tohero.application.baseResponse.BaseResponse;
+import com.neighbors.tohero.application.news.service.NewsService;
+import lombok.RequiredArgsConstructor;
+import org.springdoc.core.annotations.ParameterObject;
+import org.springframework.data.domain.Pageable;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+
+@RestController
+@RequiredArgsConstructor
+@RequestMapping("/news")
+public class NewsController {
+
+    private final NewsService newsService;
+
+    @GetMapping("")
+    public ResponseEntity<BaseResponse> getPagedNews(@ParameterObject Pageable pageable){
+        return ResponseEntity.ok()
+                .body(newsService.getPagedNews(pageable));
+    }
+}
diff --git a/src/main/java/com/neighbors/tohero/presentation/controller/UserController.java b/src/main/java/com/neighbors/tohero/presentation/controller/UserController.java
index 3907728..a129096 100644
--- a/src/main/java/com/neighbors/tohero/presentation/controller/UserController.java
+++ b/src/main/java/com/neighbors/tohero/presentation/controller/UserController.java
@@ -7,6 +7,7 @@
 import com.neighbors.tohero.common.jwt.JwtUserDetails;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
+import jakarta.servlet.http.HttpSession;
 import lombok.RequiredArgsConstructor;
 import org.springdoc.core.annotations.ParameterObject;
 import org.springframework.http.ResponseEntity;
@@ -37,4 +38,21 @@ public ResponseEntity<BaseResponse> authenticateUser(@RequestBody @Validated Aut
         return ResponseEntity.ok()
                 .body(userService.authenticateUser(authenticateUserRequest));
     }
+
+    @Operation(summary = "유저 API", description = "사용자 로그아웃 API입니다.")
+    @PostMapping("/logout")
+    public ResponseEntity<BaseResponse> logout(@Parameter(hidden=true) HttpSession httpSession){
+        return ResponseEntity.ok()
+                .body(userService.logout(httpSession));
+    }
+
+    @Operation(summary = "유저 API", description = "사용자 탈퇴하기 API입니다.")
+    @PostMapping("/signout")
+    public ResponseEntity<BaseResponse> signout(
+            @Parameter(hidden=true) @AuthenticationPrincipal JwtUserDetails jwtUserDetail,
+            @Parameter(hidden=true) HttpSession httpSession
+    ){
+        return ResponseEntity.ok()
+                .body(userService.signout(jwtUserDetail, httpSession));
+    }
 }
diff --git a/src/main/java/com/neighbors/tohero/presentation/exception_handler/AddressExceptionControllerAdvice.java b/src/main/java/com/neighbors/tohero/presentation/exception_handler/AddressExceptionControllerAdvice.java
index 3a0c67f..615a08a 100644
--- a/src/main/java/com/neighbors/tohero/presentation/exception_handler/AddressExceptionControllerAdvice.java
+++ b/src/main/java/com/neighbors/tohero/presentation/exception_handler/AddressExceptionControllerAdvice.java
@@ -16,7 +16,7 @@ public class AddressExceptionControllerAdvice {
     @ExceptionHandler(AddressException.class)
     public ResponseEntity<BaseResponse> handle_NoticeException(AddressException e) {
         BaseResponse response = new BaseResponse(
-                BaseResponseStatus.NO_RESULT,
+                e.getStatus(),
                 e.getMessage()
         );
 
diff --git a/src/main/java/com/neighbors/tohero/presentation/exception_handler/LetterExceptionControllerAdvice.java b/src/main/java/com/neighbors/tohero/presentation/exception_handler/LetterExceptionControllerAdvice.java
new file mode 100644
index 0000000..ef10e93
--- /dev/null
+++ b/src/main/java/com/neighbors/tohero/presentation/exception_handler/LetterExceptionControllerAdvice.java
@@ -0,0 +1,26 @@
+package com.neighbors.tohero.presentation.exception_handler;
+
+import com.neighbors.tohero.application.baseResponse.BaseResponse;
+import com.neighbors.tohero.application.baseResponse.BaseResponseStatus;
+import com.neighbors.tohero.common.exception.letter.LetterException;
+import com.neighbors.tohero.common.exception.notice.NoticeException;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+@RestControllerAdvice
+public class LetterExceptionControllerAdvice {
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    @ExceptionHandler(LetterException.class)
+    public ResponseEntity<BaseResponse> handle_NoticeException(LetterException e) {
+        BaseResponse response = new BaseResponse(
+                e.getStatus(),
+                e.getMessage()
+        );
+
+        return ResponseEntity.badRequest()
+                .body(response);
+    }
+}
diff --git a/src/main/java/com/neighbors/tohero/presentation/exception_handler/NewsExceptionControllerAdvice.java b/src/main/java/com/neighbors/tohero/presentation/exception_handler/NewsExceptionControllerAdvice.java
new file mode 100644
index 0000000..4e16c03
--- /dev/null
+++ b/src/main/java/com/neighbors/tohero/presentation/exception_handler/NewsExceptionControllerAdvice.java
@@ -0,0 +1,25 @@
+package com.neighbors.tohero.presentation.exception_handler;
+
+import com.neighbors.tohero.application.baseResponse.BaseResponse;
+import com.neighbors.tohero.common.exception.letter.LetterException;
+import com.neighbors.tohero.common.exception.news.NewsException;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+@RestControllerAdvice
+public class NewsExceptionControllerAdvice {
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    @ExceptionHandler(NewsException.class)
+    public ResponseEntity<BaseResponse> handle_NoticeException(NewsException e) {
+        BaseResponse response = new BaseResponse(
+                e.getStatus(),
+                e.getMessage()
+        );
+
+        return ResponseEntity.badRequest()
+                .body(response);
+    }
+}
diff --git a/src/main/java/com/neighbors/tohero/presentation/exception_handler/NoticeExceptionControllerAdvice.java b/src/main/java/com/neighbors/tohero/presentation/exception_handler/NoticeExceptionControllerAdvice.java
index 397c6e0..4d7f319 100644
--- a/src/main/java/com/neighbors/tohero/presentation/exception_handler/NoticeExceptionControllerAdvice.java
+++ b/src/main/java/com/neighbors/tohero/presentation/exception_handler/NoticeExceptionControllerAdvice.java
@@ -16,7 +16,7 @@ public class NoticeExceptionControllerAdvice {
     @ExceptionHandler(NoticeException.class)
     public ResponseEntity<BaseResponse> handle_NoticeException(NoticeException e) {
         BaseResponse response = new BaseResponse(
-                BaseResponseStatus.NO_RESULT,
+                e.getStatus(),
                 e.getMessage()
         );