diff --git a/api/@ohos.screen.d.ts b/api/@ohos.screen.d.ts
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+/*
+* Copyright (c) 2022 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
+*
+* 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.
+*/
+
+import { AsyncCallback, Callback } from './basic';
+
+/**
+ * interface of screen manager
+ * @devices tv, phone, tablet, wearable
+ * @systemapi Hide this for inner system use.
+ * @since 9
+ */
+declare namespace screen {
+  /**
+   * get all screen
+   * @devices tv, phone, tablet, wearable
+   * @since 9
+   */
+  function getAllScreen(): Promise<Array<Screen>>;
+
+  // Screen plug-in event; Screen resolution ratio and other parameters, combination relationship changes
+  function on(eventType: 'connect' | 'disconnect' | 'change', callback: Callback<number>): void;
+  function off(eventType: 'connect' | 'disconnect' | 'change', callback?: Callback<number>): void;
+
+  /**
+   * make screens as expand-screen
+   * @devices tv, phone, tablet, wearable
+   * @since 9
+   */
+  function makeExpand(options:Array<ExpandOption>): Promise<number>;
+
+  /**
+   * make screens as mirror-screen
+   * @devices tv, phone, tablet, wearable
+   * @since 9
+   */
+  function makeMirror(mainScreen:number, mirrorScreen:Array<number>): Promise<number>;
+
+  /**
+   * the parameter of making expand screen
+   * @devices tv, phone, tablet, wearable
+   * @since 9
+   */
+  interface ExpandOption {
+    /**
+     * screen id
+     */
+    screenId: number;
+
+    /**
+     * the start coordinate X of the screen origin
+     */
+    startX: number;
+
+    /**
+     * the start coordinate Y of the screen origin
+     */
+    startY: number;
+  }
+
+  /**
+   * interface for screen
+   * @devices tv, phone, tablet, wearable
+   * @since 9
+   */
+  interface Screen {
+    /**
+     * get screen id
+     * @devices tv, phone, tablet, wearable
+     * @since 9
+     */
+    readonly id: number;
+
+    // return group id
+    readonly parent: number;
+
+    readonly supportedModeInfo: Array<ScreenModeInfo>;
+
+    readonly activeModeIndex: number;
+
+    readonly orientation: Orientation;
+
+    /**
+     * set the orientation of the screen
+     * @devices tv, phone, tablet, wearable
+     * @since 9
+     */
+    setOrientation(orientation: Orientation): Promise<boolean>;
+
+    setScreenActiveMode(modeIndex: number): Promise<boolean>;
+  }
+
+  /**
+   * interface for screen group
+   * @devices tv, phone, tablet, wearable
+   * @since 9
+   */
+   interface ScreenGroup {
+    /**
+     * get screen group id
+     * @devices tv, phone, tablet, wearable
+     * @since 9
+     */
+    id: number;
+
+    combinationInfo: ExpandInfo | MirrorInfo;
+  }
+
+  interface ExpandInfo {
+    screenId: Array<number>;
+    startX: Array<number>;
+    startY: Array<number>;
+  }
+
+  interface MirrorInfo {
+    mainScreenId: number;
+    mirrorScreenId: Array<number>;
+  }
+
+  enum Orientation {
+    UNSPECIFIED = 0,
+    VERTICAL = 1,
+    HORIZONTAL = 2,
+    REVERSE_VERTICAL = 3,
+    REVERSE_HORIZONTAL = 4,
+    SENSOR = 5,
+    SENSOR_VERTICAL = 6,
+    SENSOR_HORIZONTAL = 7,
+  }
+
+  interface ScreenModeInfo {
+    id: number;
+    width: number;
+    height: number;
+    refreshRate: number;
+  }
+}
+
+export default screen;