diff --git a/client/web/src/plugin/manager.ts b/client/web/src/plugin/manager.ts
index b4d54c66..652fe73f 100644
--- a/client/web/src/plugin/manager.ts
+++ b/client/web/src/plugin/manager.ts
@@ -7,6 +7,7 @@ import { initMiniStar, loadSinglePlugin } from 'mini-star';
 import _once from 'lodash/once';
 import { builtinPlugins } from './builtin';
 import { showPluginLoadError } from './showPluginLoadError';
+import { injectTailchatGlobalValue } from '@/utils/global-helper';
 
 class PluginManager {
   /**
@@ -133,3 +134,4 @@ class PluginManager {
 }
 
 export const pluginManager = new PluginManager();
+injectTailchatGlobalValue('installPlugin', pluginManager.installPlugin);
diff --git a/client/web/src/utils/global-helper.ts b/client/web/src/utils/global-helper.ts
new file mode 100644
index 00000000..29b2cf91
--- /dev/null
+++ b/client/web/src/utils/global-helper.ts
@@ -0,0 +1,15 @@
+type TailchatTypeMap = NonNullable<typeof window.tailchat>;
+
+/**
+ * 注入tailchat全局变量到window
+ */
+export function injectTailchatGlobalValue<T extends keyof TailchatTypeMap>(
+  key: T,
+  value: TailchatTypeMap[T]
+) {
+  if (!window.tailchat) {
+    window.tailchat = {};
+  }
+
+  window.tailchat[key] = value;
+}
diff --git a/client/web/types/global.d.ts b/client/web/types/global.d.ts
new file mode 100644
index 00000000..eb41d636
--- /dev/null
+++ b/client/web/types/global.d.ts
@@ -0,0 +1,63 @@
+/**
+ * Copy from `tailchat/client/shared/model/plugin.ts`
+ */
+interface PluginManifest {
+  /**
+   * 插件用于显示的名称
+   * @example 网页面板插件
+   */
+  label: string;
+
+  /**
+   * 插件名, 插件唯一标识
+   * @example com.msgbyte.webview
+   */
+  name: string;
+
+  /**
+   * 插件地址
+   */
+  url: string;
+
+  /**
+   * 插件图标
+   * 推荐大小: 128x128
+   */
+  icon?: string;
+
+  /**
+   * 插件版本号
+   * 遵循 semver 规则
+   *
+   * major.minor.patch
+   * @example 1.0.0
+   */
+  version: string;
+
+  /**
+   * 插件维护者
+   */
+  author: string;
+
+  /**
+   * 插件描述
+   */
+  description: string;
+
+  /**
+   * 是否需要重启才能应用插件
+   */
+  requireRestart: boolean;
+
+  /**
+   * 文档的链接
+   * 如果是markdown则解析, 如果是html则使用iframe
+   */
+  documentUrl?: string;
+}
+
+declare interface Window {
+  tailchat?: {
+    installPlugin?: (manifest: PluginManifest) => Promise<void>;
+  };
+}