diff --git a/README.md b/README.md
index b14abb8494772dd8cc25f9e91f8de3e9f27e6691..87465c986a10e4919ec79df88450650580b8f8b1 100644
--- a/README.md
+++ b/README.md
@@ -266,6 +266,36 @@ Chrome restricts the usage of WebCryptographyApi to secure origins. It means 'ht
   | delay   | number   | 网络时延，单位是ms |
   | bitrate | number   | 码率，单位是kbps   |
 
+### 4.12 云手机桌面（home）功能
+
+- 接口介绍
+
+  cloudApp.home();
+
+- 功能描述
+
+  进入云手机桌面。
+
+### 4.13 云手机回退（back）功能
+
+- 接口介绍
+
+  cloudApp.back();
+
+- 功能描述
+
+  应用退出、返回上一步。
+
+### 4.14 云手机多任务（menu）功能
+
+- 接口介绍
+
+  cloudApp.menu();
+
+- 功能描述
+
+  进入云手机多任务页面。
+
 ### 5. 开发指导
 ### 6. license
 Apache License 2.0。
\ No newline at end of file
diff --git a/sdk/demo/demo.html b/sdk/demo/demo.html
index dc8a403aee776002a5ac4f958768c2ed0c654f5d..cb58d925241967d41f542c7a6544fcc41543a92a 100644
--- a/sdk/demo/demo.html
+++ b/sdk/demo/demo.html
@@ -399,9 +399,9 @@ Copyright 2022 Huawei Cloud Computing Technology Co., Ltd.
         <div class="button-exit" id="exitBtn" onclick="showExitModal()">退出云手机</div>
       </div>
       <div class="button-list">
-        <button class="back-btn" id="backBtn" onclick="sendKeyCodeCmd(4)">返回</button>
-        <button class="home-btn" id="homeBtn" onclick="sendKeyCodeCmd(3)">桌面</button>
-        <button class="list-btn" id="listBtn" onclick="sendKeyCodeCmd(187)">多任务</button>
+        <button class="back-btn" id="backBtn" onclick="sendKeyCodeBack()">返回</button>
+        <button class="home-btn" id="homeBtn" onclick="sendKeyCodeHome()">桌面</button>
+        <button class="list-btn" id="listBtn" onclick="sendKeyCodeMenu()">多任务</button>
       </div>
     </div>
   </div>
@@ -444,9 +444,9 @@ Copyright 2022 Huawei Cloud Computing Technology Co., Ltd.
     </div>
   </div>
   <div class="normal-btn">
-    <button onclick="sendKeyCodeCmd(4)">返回</button>
-    <button onclick="sendKeyCodeCmd(3)">桌面</button>
-    <button onclick="sendKeyCodeCmd(187)">多任务</button>
+    <button onclick="sendKeyCodeBack()">返回</button>
+    <button onclick="sendKeyCodeHome()">桌面</button>
+    <button onclick="sendKeyCodeMenu()">多任务</button>
     <button onclick="showExitModal()">退出云手机</button>
   </div>
 </div>
@@ -774,27 +774,20 @@ Copyright 2022 Huawei Cloud Computing Technology Co., Ltd.
     console.log("Is in fullscreen?", cloudapp.isFullscreen());
   }
 
-  function sendKeyCodeCmd(code) {
-    // keyCodeType与PROTOCOL_CONFIG中KEYEVENT_KEYCODE_TYPE对应
-    let keyCodeType = '';
-    switch (code) {
-      case 4:
-        keyCodeType = 'KEYCODE_BACK';
-        break;
-      case 3:
-        keyCodeType = 'KEYCODE_HOME';
-        break;
-      case 187:
-        keyCodeType = 'KEYCODE_APP_SWITCH';
-        break;
-      default:
-        break;
-    }
-    cloudapp.sendKeyCodeCmd(keyCodeType);
+  function sendKeyCodeBack() {
+    cloudapp.back();
+  }
+
+  function sendKeyCodeHome() {
+    cloudapp.home();
     const buttonModalEle = document.getElementById('buttonModal');
-    if (keyCodeType !== 'KEYCODE_BACK') {
-      buttonModalEle.style.display = 'none';
-    }
+    buttonModalEle.style.display = 'none';
+  }
+
+  function sendKeyCodeMenu() {
+    cloudapp.menu();
+    const buttonModalEle = document.getElementById('buttonModal');
+    buttonModalEle.style.display = 'none';
   }
 
   function setResolution() {
diff --git a/sdk/index.html b/sdk/index.html
index dc8a403aee776002a5ac4f958768c2ed0c654f5d..cb58d925241967d41f542c7a6544fcc41543a92a 100644
--- a/sdk/index.html
+++ b/sdk/index.html
@@ -399,9 +399,9 @@ Copyright 2022 Huawei Cloud Computing Technology Co., Ltd.
         <div class="button-exit" id="exitBtn" onclick="showExitModal()">退出云手机</div>
       </div>
       <div class="button-list">
-        <button class="back-btn" id="backBtn" onclick="sendKeyCodeCmd(4)">返回</button>
-        <button class="home-btn" id="homeBtn" onclick="sendKeyCodeCmd(3)">桌面</button>
-        <button class="list-btn" id="listBtn" onclick="sendKeyCodeCmd(187)">多任务</button>
+        <button class="back-btn" id="backBtn" onclick="sendKeyCodeBack()">返回</button>
+        <button class="home-btn" id="homeBtn" onclick="sendKeyCodeHome()">桌面</button>
+        <button class="list-btn" id="listBtn" onclick="sendKeyCodeMenu()">多任务</button>
       </div>
     </div>
   </div>
@@ -444,9 +444,9 @@ Copyright 2022 Huawei Cloud Computing Technology Co., Ltd.
     </div>
   </div>
   <div class="normal-btn">
-    <button onclick="sendKeyCodeCmd(4)">返回</button>
-    <button onclick="sendKeyCodeCmd(3)">桌面</button>
-    <button onclick="sendKeyCodeCmd(187)">多任务</button>
+    <button onclick="sendKeyCodeBack()">返回</button>
+    <button onclick="sendKeyCodeHome()">桌面</button>
+    <button onclick="sendKeyCodeMenu()">多任务</button>
     <button onclick="showExitModal()">退出云手机</button>
   </div>
 </div>
@@ -774,27 +774,20 @@ Copyright 2022 Huawei Cloud Computing Technology Co., Ltd.
     console.log("Is in fullscreen?", cloudapp.isFullscreen());
   }
 
-  function sendKeyCodeCmd(code) {
-    // keyCodeType与PROTOCOL_CONFIG中KEYEVENT_KEYCODE_TYPE对应
-    let keyCodeType = '';
-    switch (code) {
-      case 4:
-        keyCodeType = 'KEYCODE_BACK';
-        break;
-      case 3:
-        keyCodeType = 'KEYCODE_HOME';
-        break;
-      case 187:
-        keyCodeType = 'KEYCODE_APP_SWITCH';
-        break;
-      default:
-        break;
-    }
-    cloudapp.sendKeyCodeCmd(keyCodeType);
+  function sendKeyCodeBack() {
+    cloudapp.back();
+  }
+
+  function sendKeyCodeHome() {
+    cloudapp.home();
     const buttonModalEle = document.getElementById('buttonModal');
-    if (keyCodeType !== 'KEYCODE_BACK') {
-      buttonModalEle.style.display = 'none';
-    }
+    buttonModalEle.style.display = 'none';
+  }
+
+  function sendKeyCodeMenu() {
+    cloudapp.menu();
+    const buttonModalEle = document.getElementById('buttonModal');
+    buttonModalEle.style.display = 'none';
   }
 
   function setResolution() {
diff --git a/sdk/src/CloudApp.js b/sdk/src/CloudApp.js
index 837a5fd81e31eaa4955320210153a16257ade91b..1551a3dd09f8183a5be6f03a784918357fed04f5 100644
--- a/sdk/src/CloudApp.js
+++ b/sdk/src/CloudApp.js
@@ -80,8 +80,16 @@ class CloudApp {
         this.channel.sendDataToCloudApp(data);
     }
 
-    sendKeyCodeCmd(keyCodeType) {
-        this.channel.sendKeyCodeMsg(keyCodeType);
+    home() {
+        this.channel.sendKeyCodeMsg('KEYCODE_HOME');
+    }
+
+    back() {
+        this.channel.sendKeyCodeMsg('KEYCODE_BACK');
+    }
+
+    menu() {
+        this.channel.sendKeyCodeMsg('KEYCODE_APP_SWITCH');
     }
 
     _getChannel(containerId, options) {