diff --git a/libs/extension/src/background/index.ts b/libs/extension/src/background/index.ts
new file mode 100644
index 00000000..2745c61a
--- /dev/null
+++ b/libs/extension/src/background/index.ts
@@ -0,0 +1,58 @@
+// 多个页面、tab页共享一个 background，需要建立连接池，给每个tab建立连接
+const connections = {};
+
+// panel 代码中调用 let backgroundPageConnection = chrome.runtime.connect({...}) 会触发回调函数
+chrome.runtime.onConnect.addListener(function (port) {
+
+  // The original connection event doesn't include the tab ID of the
+  // DevTools page, so we need to send it explicitly.
+  function extensionListener(message, sender, sendResponse) {
+    // 在backgroundPageConnection创建后会发送初始化请求，这样就可以获取tabId，给连接编号
+    if (message.name === 'init') {
+      // 获取 panel 所在 tab 页的tabId
+      connections[message.tabId] = port;
+      chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
+        chrome.tabs.sendMessage(tabs[0].id, {tag: 'init horizon info'}, function(response) {
+          console.log(response.farewell);
+        });
+      });
+      return;
+    }
+
+    if (message.name === 'update') {
+      return;
+    }
+    // other message handling
+  }
+
+  // Listen to messages sent from the DevTools page
+  port.onMessage.addListener(extensionListener);
+
+  port.onDisconnect.addListener(function (port) {
+    port.onMessage.removeListener(extensionListener);
+
+    const tabs = Object.keys(connections);
+    for (let i = 0, len = tabs.length; i < len; i++) {
+      if (connections[tabs[i]] == port) {
+        delete connections[tabs[i]];
+        break;
+      }
+    }
+  });
+});
+
+// 监听来自 content script 的消息，并将消息发送给对应的 devTools page，也就是 panel
+chrome.runtime.onMessage.addListener(function(request, sender, sendResponse) {
+  // Messages from content scripts should have sender.tab set
+  if (sender.tab) {
+    const tabId = sender.tab.id;
+    if (tabId in connections) {
+      connections[tabId].postMessage(request);
+    } else {
+      console.log('Tab not found in connection list.');
+    }
+  } else {
+    console.log('sender.tab not defined.');
+  }
+  return true;
+});
diff --git a/libs/extension/src/contentScript/index.ts b/libs/extension/src/contentScript/index.ts
new file mode 100644
index 00000000..2236496a
--- /dev/null
+++ b/libs/extension/src/contentScript/index.ts
@@ -0,0 +1,36 @@
+import { injectCode } from '../utils/injectUtils';
+
+// 页面的window对象不能直接通过 contentScript 代码修改，只能通过添加 js 代码往页面 window 注入hook
+injectCode(chrome.runtime.getURL('/injector.js'));
+
+// 监听来自页面的信息
+window.addEventListener('message', event => {
+  // 只监听来自本页面的消息
+  if (event.source !== window) {
+    return;
+  }
+
+  if (event.data.type && (event.data.type === 'HORIZON_DEV_TOOLS')) {
+    console.log('Content script received: ' + JSON.stringify(event.data.vNode));
+    // 传递给background
+    chrome.runtime.sendMessage(event.data.vNode, function (response) {
+      console.log(response);
+    });
+  }
+}, false);
+
+
+
+// 监听来自background的消息
+chrome.runtime.onMessage.addListener(
+  function (request, sender, sendResponse) {
+    console.log(sender.tab ?
+      'from a content script:' + sender.tab.url :
+      'from the extension');
+    if (request.tag === 'init horizon info') {
+      // 传递消息给页面
+      console.log('start pass info to webpage');
+      window.postMessage({type: 'HORIZON_DEV_TOOLS', id: 1}, '*');
+    }
+  }
+);
diff --git a/libs/extension/src/injector/index.ts b/libs/extension/src/injector/index.ts
new file mode 100644
index 00000000..178cf608
--- /dev/null
+++ b/libs/extension/src/injector/index.ts
@@ -0,0 +1,32 @@
+import parseTreeRoot from "../parser/parseVNode";
+
+function injectHook() {
+  if (window.__HORIZON_DEV_HOOK__) {
+    return;
+  }
+  Object.defineProperty(window, '__HORIZON_DEV_HOOK__', {
+    enumerable: false,
+    value: {
+      roots: [],
+      send: function (vNode: any) {
+        const result = parseTreeRoot(vNode);
+        window.postMessage({
+          type: 'HORIZON_DEV_TOOLS', vNode: result
+        }, '*');
+      },
+      listen: function (id: number) {
+        window.addEventListener('message', function(event) {
+          // We only accept messages from ourselves
+          if (event.source !== window) {
+            return;
+          }
+
+          if (event.data.type && (event.data.type === 'HORIZON_DEV_TOOLS') && event.data.id === id) {
+            console.log('todo');
+          }
+        });
+      }
+    },
+  });
+}
+injectHook();
diff --git a/libs/extension/src/main/index.ts b/libs/extension/src/main/index.ts
new file mode 100644
index 00000000..b81f544c
--- /dev/null
+++ b/libs/extension/src/main/index.ts
@@ -0,0 +1,7 @@
+chrome.devtools.panels.create('Horizon',
+    '',
+    'panel.html',
+    function(panel) {
+      
+    }
+);
\ No newline at end of file
diff --git a/libs/extension/src/main/main.html b/libs/extension/src/main/main.html
new file mode 100644
index 00000000..540f18ae
--- /dev/null
+++ b/libs/extension/src/main/main.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+  <head>
+  </head>
+  <body>
+    </div>
+    <div>
+      <p>Horizon dev tools!</p>
+    </div>
+  </body>
+  <script src="main.js"></script>
+</html>
diff --git a/libs/extension/src/manifest.json b/libs/extension/src/manifest.json
new file mode 100644
index 00000000..3db7b374
--- /dev/null
+++ b/libs/extension/src/manifest.json
@@ -0,0 +1,22 @@
+{
+  "name": "Horizon dev tool",
+  "description": "Horizon chrome dev extension",
+  "version": "1.0",
+  "minimum_chrome_version": "10.0",
+  "manifest_version": 3,
+  "background": {
+    "service_worker": "background.js"
+  },
+  "permissions": ["storage", "activeTab", "scripting"],
+
+  "devtools_page": "main.html",
+  "action": {},
+  "content_scripts": [
+    {
+      "matches": ["<all_urls>"],
+      "js": ["contentScript.js"],
+      "run_at": "document_start"
+    }
+  ],
+    "web_accessible_resources": []
+}
diff --git a/libs/extension/src/utils/injectUtils.ts b/libs/extension/src/utils/injectUtils.ts
new file mode 100644
index 00000000..583eb5ea
--- /dev/null
+++ b/libs/extension/src/utils/injectUtils.ts
@@ -0,0 +1,19 @@
+
+function ifNullThrows(v) {
+  if (v === null) {
+    throw new Error('received a null');
+  }
+  return v;
+}
+
+// 用于向页面注入脚本
+export function injectCode(src) {
+  const script = document.createElement('script');
+  script.src = src;
+  script.onload = function () {
+    // 加载完毕后需要移除
+    script.remove();
+  };
+
+  ifNullThrows(document.head || document.documentElement).appendChild(script);
+}
diff --git a/libs/extension/src/utils.ts b/libs/extension/src/utils/regExpUtils.ts
similarity index 100%
rename from libs/extension/src/utils.ts
rename to libs/extension/src/utils/regExpUtils.ts
diff --git a/libs/extension/webpack.config.js b/libs/extension/webpack.config.js
index 3910117e..f712808b 100644
--- a/libs/extension/webpack.config.js
+++ b/libs/extension/webpack.config.js
@@ -7,7 +7,6 @@ const config = {
     injector: './src/injector/index.ts',
     contentScript: './src/contentScript/index.ts',
     panel: './src/panel/index.tsx',
-    popup: './src/popup/index.ts',
   },
   output: {
     path: path.resolve(__dirname, './build'),