diff --git a/runtime/main/app/App.ts b/runtime/main/app/App.ts
index bf8089c1..1b23d10a 100644
--- a/runtime/main/app/App.ts
+++ b/runtime/main/app/App.ts
@@ -13,13 +13,13 @@
  * limitations under the License.
  */
 
-import Page from '../page/index';
+import { pageMap, PageLinkedMap } from './map';
 
 /**
  * This class defines the information of a application.
  */
 export class App {
-  public static pageMap: Map<string, Page> = new Map();
+  public static pageMap: PageLinkedMap = pageMap;
   private _packageName: string;
   private _appInstanceId: string;
   private _events: object;
@@ -140,14 +140,6 @@ export class App {
       that._appGlobal[api] = timerAPIs[api];
     });
   }
-
-  /**
-   * Get page.
-   * @return {Page} Page.
-   */
-  public getAppInstance(): Page {
-    return App.pageMap.get(this._appInstanceId);
-  }
 }
 
 /**
diff --git a/runtime/main/app/bundle.ts b/runtime/main/app/bundle.ts
index d7558684..2782e9c0 100644
--- a/runtime/main/app/bundle.ts
+++ b/runtime/main/app/bundle.ts
@@ -32,7 +32,7 @@ import {
   registerCustomComponent,
   requireModule
 } from '../page/register';
-import { appMap } from './map';
+import { pageMap, appMap } from './map';
 import { updateLocale, updateDpi } from './index';
 import Page from '../page/index';
 import { App } from './App';
@@ -58,7 +58,7 @@ export const defineFn = function(page: Page, packageName: string, name?: string,
     const pageRequire = (name: string) : any => {
       if (isModule(name)) {
         const appFunction = (): Page => {
-          return page || appMap[packageName].getAppInstance();
+          return pageMap.getTop(packageName) || page;
         };
         return requireModule(appFunction, removePrefix(name));
       }
diff --git a/runtime/main/app/index.ts b/runtime/main/app/index.ts
index 4f30496e..50c9dfa8 100644
--- a/runtime/main/app/index.ts
+++ b/runtime/main/app/index.ts
@@ -22,6 +22,7 @@ import {
 import { appMap } from './map';
 import { getPageGlobal } from './helper';
 import { App } from './App';
+import { PageLinkedMap } from './map';
 import Page from '../page/index';
 import { destroy } from '../page/api/index';
 import { mockSystemPlugin } from '../extend/systemplugin/index';
@@ -77,7 +78,7 @@ interface ParseOptions {
   $app_require$(name: string): void; // eslint-disable-line camelcase
 }
 
-const pageMap: Map<string, Page> = App.pageMap;
+const pageMap: PageLinkedMap = App.pageMap;
 
 /**
  * Create app page, run jsbundle code.
@@ -96,7 +97,7 @@ export function appCreate(page: Page, options: Options, data: object, services:
   }
   const packageName: string = page.packageName;
   const appPage: Page = new Page(options.appInstanceId, options, packageName, data);
-  pageMap.set(appPage.id, appPage);
+  pageMap.unshift(appPage);
   Log.debug(`Create a page with: ${packageName}.`);
   appMap[packageName] = new App(packageName, options.appInstanceId);
   const timerAPIs: object = genTimerAPI(appPage);
@@ -111,8 +112,10 @@ export function appCreate(page: Page, options: Options, data: object, services:
     Log.debug(`After create a page(${page.id}).`);
   };
 
+  const appFunction = () => pageMap.getTop(packageName) || page;
+
   // require in top app(instance)
-  const appRequireModule = name => requireModule(page || appPage, removePrefix(name));
+  const appRequireModule = name => requireModule(appFunction, removePrefix(name));
   const parseOptions: ParseOptions = {
     $app_define$: appDefine,
     $app_bootstrap$: appBootstrap,
@@ -189,7 +192,7 @@ export function appDestroy(packageName: string): void {
   app.emitEvent('hook:onDestroy');
   app.deleteGlobalKeys();
   delete appMap[packageName];
-  const appPage: Page = pageMap.get(app.appInstanceId);
+  const appPage: Page = pageMap[app.appInstanceId];
   if (appPage) {
     if (appPage.doc.taskCenter.callbackIsEmpty()) {
       appPage.callTasks([{
@@ -198,7 +201,7 @@ export function appDestroy(packageName: string): void {
         args: []
       }]);
       destroy(appPage);
-      pageMap.delete(appPage.id);
+      pageMap.remove(appPage);
     } else {
       appPage.destroyed = true;
     }
diff --git a/runtime/main/app/map.ts b/runtime/main/app/map.ts
index deb28b8a..15592740 100644
--- a/runtime/main/app/map.ts
+++ b/runtime/main/app/map.ts
@@ -1,19 +1,76 @@
 /*
- * Copyright (c) 2021 Huawei Device Co., Ltd.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ *   http://www.apache.org/licenses/LICENSE-2.0
  *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
  */
 
+import Page from '../page/index';
+
 /**
-  * Save App.
-  */
-export const appMap: object = {};
+ * This class defines the map for the page instances.
+ */
+export class PageLinkedMap {
+  public _map: Page[];
+
+  constructor() {
+    this._map = [];
+  }
+
+  public unshift(instance: Page) {
+    this._map.unshift(instance);
+    Object.defineProperty(this, instance.id, {
+      configurable: true,
+      enumerable: true,
+      get: function proxyGetter() {
+        return proxyGet(this, instance.id);
+      }
+    });
+  }
+
+  public push(instance: Page) {
+    this._map.push(instance);
+    Object.defineProperty(this, instance.id, {
+      configurable: true,
+      enumerable: true,
+      get: function proxyGetter() {
+        return proxyGet(this, instance.id);
+      }
+    });
+  }
+
+  public remove(instance: Page) {
+    const index = this._map.indexOf(instance);
+    delete this[instance.id];
+    // @ts-ignore
+    delete this._map.splice(index, 1);
+  }
+
+  public getTop(packageName: string) {
+    const appMap = this._map.filter(instance => {
+      return instance.packageName === packageName;
+    });
+    return appMap && appMap[appMap.length - 1];
+  }
+}
+
+function proxyGet(pageLinkedMap: PageLinkedMap, id: string) {
+  const index = pageLinkedMap._map.map(instance => instance.id).lastIndexOf(id);
+  return pageLinkedMap._map[index];
+}
+
+export const pageMap: PageLinkedMap = new PageLinkedMap();
+
+export const appMap = {};
diff --git a/runtime/main/manage/event/bridge.ts b/runtime/main/manage/event/bridge.ts
index 853cf9c1..c7466a23 100644
--- a/runtime/main/manage/event/bridge.ts
+++ b/runtime/main/manage/event/bridge.ts
@@ -23,6 +23,7 @@
 
 import { Log } from '../../../utils/index';
 import { App } from '../../app/App';
+import { PageLinkedMap } from '../../app/map';
 import Page from '../../page';
 import {
   fireEvent,
@@ -31,7 +32,7 @@ import {
   destroy
 } from '../../page/api/index';
 
-const pageMap: Map<string, Page> = App.pageMap;
+const pageMap: PageLinkedMap = App.pageMap;
 
 const eventHandlers = {
   /**
@@ -40,7 +41,7 @@ const eventHandlers = {
    * @param {*} args - Args.
    */
   fireEvent: (id: string, ...args: any[]) => {
-    return fireEvent(pageMap.get(id), ...args);
+    return fireEvent(pageMap[id], ...args);
   },
 
   /**
@@ -49,7 +50,7 @@ const eventHandlers = {
    * @param {*} args - Args
    */
   callback: (id: string, ...args: any[]) => {
-    return callback(pageMap.get(id), ...args);
+    return callback(pageMap[id], ...args);
   },
 
   /**
@@ -58,7 +59,7 @@ const eventHandlers = {
    * @param {*} args - Args.
    */
   fireEventSync: (id: string, ...args: any[]) => {
-    return fireEventSync(pageMap.get(id), ...args);
+    return fireEventSync(pageMap[id], ...args);
   }
 };
 
@@ -71,7 +72,7 @@ const eventHandlers = {
 export function receiveTasks(id: string, tasks: any[]): any[] | Error {
   id = id.toString();
   Log.debug(`ReceiveTasks id ${id}, tasks: ${JSON.stringify(tasks)}`);
-  const page: Page = pageMap.get(id);
+  const page: Page = pageMap[id];
   if (page && Array.isArray(tasks)) {
     const results = [];
     tasks.forEach((task) => {
@@ -89,7 +90,7 @@ export function receiveTasks(id: string, tasks: any[]): any[] | Error {
         args: []
       }]);
       destroy(page);
-      pageMap.delete(id);
+      pageMap.remove(page);
     }
     return results;
   }
diff --git a/runtime/main/manage/instance/life.ts b/runtime/main/manage/instance/life.ts
index 089db9ce..cc23c959 100644
--- a/runtime/main/manage/instance/life.ts
+++ b/runtime/main/manage/instance/life.ts
@@ -19,12 +19,13 @@
 
 import { destroy } from '../../page/api/index';
 import { App } from '../../app/App';
+import { PageLinkedMap } from '../../app/map';
 import { resetTarget } from '../../reactivity/dep';
 import Page from '../../page';
 import { init as initApp } from '../../page/api/index';
 import { appCreate, Options } from '../../app/index';
 
-const pageMap: Map<string, Page> = App.pageMap;
+const pageMap: PageLinkedMap = App.pageMap;
 
 /**
  * Create a page.
@@ -40,14 +41,14 @@ export function createInstance(id: string, code: string, options: Options, data:
   const { I18n, dpi } = services;
   resetTarget();
 
-  let page: Page = pageMap.get(id);
+  let page: Page = pageMap[id];
   let result: object;
   if (!page) {
     page = new Page(id, options, options.packageName, data);
     page.i18nService = I18n;
     page.dpiService = dpi;
     appCreate(page, options, data, services);
-    pageMap.set(id, page);
+    pageMap.push(page);
     result = initApp(page, code, data, services);
   } else {
     result = new Error(`invalid page id "${id}"`);
@@ -65,11 +66,11 @@ export function destroyInstance(id: string): object {
     markupState();
   }
   resetTarget();
-  const page: Page = pageMap.get(id);
+  const page: Page = pageMap[id];
   if (!page) {
     return new Error(`invalid page id '${id}'.`);
   }
-  pageMap.delete(id);
+  pageMap.remove(page);
   destroy(page);
 
   // Tell v8 to do a full Garbage Collection every eighteen times.
diff --git a/runtime/main/manage/instance/misc.ts b/runtime/main/manage/instance/misc.ts
index ee6742a0..92ad84fd 100644
--- a/runtime/main/manage/instance/misc.ts
+++ b/runtime/main/manage/instance/misc.ts
@@ -18,9 +18,10 @@
  */
 
 import { App } from '../../app/App';
+import { PageLinkedMap } from '../../app/map';
 import Page from '../../page';
 
-const pageMap: Map<string, Page> = App.pageMap;
+const pageMap: PageLinkedMap = App.pageMap;
 
 /**
  * Get an element tree of a page.
@@ -28,7 +29,7 @@ const pageMap: Map<string, Page> = App.pageMap;
  * @return {Object} A virtual dom tree.
  */
 export function getRoot(id: string): object {
-  const page: Page = pageMap.get(id);
+  const page: Page = pageMap[id];
   let result: any;
   if (page) {
     const doc: any = page.doc || {};
diff --git a/runtime/main/page/entry/bundle.ts b/runtime/main/page/entry/bundle.ts
index 4b79cfe2..3ce84570 100644
--- a/runtime/main/page/entry/bundle.ts
+++ b/runtime/main/page/entry/bundle.ts
@@ -31,7 +31,7 @@ import {
   registerCustomComponent,
   requireModule
 } from '../register';
-import { appMap } from '../../app/map';
+import { pageMap } from '../../app/map';
 import Vm from '../../model/index';
 import Page from '../index';
 import {updateDpi, updateLocale} from '../../app';
@@ -61,7 +61,7 @@ export const defineFn = function(page: Page, name?: string, ...args: any[] | nul
           if (packageName === 'notset') {
             return page;
           }
-          const appPage: Page = appMap[packageName].getAppInstance();
+          const appPage: Page = pageMap.getTop(packageName);
           return appPage || page;
         };
         const moduleName: string = removePrefix(name);
diff --git a/runtime/main/page/entry/init.ts b/runtime/main/page/entry/init.ts
index 24244da5..0a0b4cea 100644
--- a/runtime/main/page/entry/init.ts
+++ b/runtime/main/page/entry/init.ts
@@ -81,7 +81,7 @@ export function init(page: Page, code: string | Function, data: object, services
     if (packageName === 'notset') {
       return page;
     }
-    const instance = App.pageMap.get(page.id);
+    const instance = App.pageMap.getTop(packageName);
     return instance || page;
   };
 
diff --git a/test/ut/app/index.ts b/test/ut/app/index.ts
index f8ef77c3..b68635f1 100644
--- a/test/ut/app/index.ts
+++ b/test/ut/app/index.ts
@@ -53,12 +53,10 @@ describe('App Instance', () => {
     });
 
     it('with some apis', () => {
-      expect(typeof app.getAppInstance).eql('function');
       expect(typeof app.deleteGlobalKeys).eql('function');
     });
 
     it('run apis', () => {
-      expect(app.getAppInstance()).eql(appInstanceId);
       expect(app.deleteGlobalKeys()).to.be.undefined;
     });
   });
diff --git a/test/ut/runtime.ts b/test/ut/runtime.ts
index f43da5b0..a62a8fb5 100644
--- a/test/ut/runtime.ts
+++ b/test/ut/runtime.ts
@@ -36,6 +36,7 @@ import {
   allModules
 } from '../../runtime/main/page/register';
 import { App } from '../../runtime/main/app/App';
+import { PageLinkedMap } from '../../runtime/main/app/map';
 import Page from '../../runtime/main/page';
 
 const expect = chai.expect;
@@ -50,7 +51,7 @@ function clearRefs(json) {
 describe('framework entry', () => {
   fakeLog();
 
-  const pageMap: Map<string, Page> = App.pageMap;
+  const pageMap: PageLinkedMap = App.pageMap;
   let instanceId;
   const options = {
     orientation: 'portrait',
@@ -142,7 +143,7 @@ describe('framework entry', () => {
       }
     };
     framework.createInstance(instanceId, code, options, null);
-    expect(pageMap.get(instanceId).customComponentMap).eql(expectComponent);
+    expect(pageMap[instanceId].customComponentMap).eql(expectComponent);
   });
 
   describe('getRoot', () => {