diff --git a/Observable.js b/Observable.js
index 03545cd..49e3e97 100644
--- a/Observable.js
+++ b/Observable.js
@@ -11,12 +11,22 @@ class ObserverList {
   }
   add(observer) {
     // todo add observer to list
+    this.observerList.push(observer)
   }
   remove(observer) {
     // todo remove observer from list
+    let inx = this.observerList.indexOf(observer)
+    if (inx > -1) {
+      this.observerList.splice(inx, 1)
+      return true
+    } else {
+      return '没有该观察者'
+    }
+
   }
   count() {
     // return observer list size
+    return this.observerList.length
   }
 }
 
@@ -26,12 +36,17 @@ class Subject {
   }
   addObserver(observer) {
     // todo add observer
+    this.observers.add(observer)
   }
   removeObserver(observer) {
     // todo remove observer
+    this.observers.remove(observer)
   }
   notify(...args) {
     // todo notify
+    this.observers.observerList.forEach(observer => {
+      observer.update && observer.update(...args)
+    })
   }
 }
 
diff --git a/PubSub.js b/PubSub.js
index 0c7999e..bf96c7b 100644
--- a/PubSub.js
+++ b/PubSub.js
@@ -13,14 +13,38 @@ module.exports = class PubSub {
 
   subscribe(type, fn) {
     // todo subscribe
+    this.subscribers[type] = this.subscribers[type] || []
+    // 增加监听事件
+    this.subscribers[type].push(fn)
   }
 
   unsubscribe(type, fn) {
     // todo unsubscribe
+    // 未监听该事件
+    let ary = this.subscribers[type]
+    if (!ary) {
+      return '未监听该类型的事件'
+    }
+    // 解除该监听事件
+    let inx = ary.indexOf(fn)
+    if (inx > -1) {
+      ary.splice(inx, 1)
+      return true
+    } else {
+      return '该类型上没有该事件'
+    }
   }
 
   publish(type, ...args) {
     // todo publish
+    let ary = this.subscribers[type]
+    if (!ary) {
+      return
+    }
+    // 触发该订阅事件
+    ary.forEach(fn => {
+      fn(...args)
+    })
   }
 
 }