diff --git a/api/@ohos.deviceInfo.d.ts b/api/@ohos.deviceInfo.d.ts
index 8e91729a901cf1b776dfa7611728b7a507c71410..e5ff2135b48ffdc89b4c10d21d0ba9f4580225c1 100644
--- a/api/@ohos.deviceInfo.d.ts
+++ b/api/@ohos.deviceInfo.d.ts
@@ -24,105 +24,105 @@ declare namespace deviceInfo {
      * Obtains the device type represented by a string,
      * which can be {@code phone} (or {@code default} for phones), {@code wearable}, {@code liteWearable},
      * {@code tablet}, {@code tv}, {@code car}, or {@code smartVision}.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const deviceType: string;
 
     /**
      * Obtains the device manufacturer represented by a string.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const manufacture: string;
 
     /**
      * Obtains the device brand represented by a string.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const brand: string;
 
     /**
      * Obtains the external product series represented by a string.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const marketName: string;
 
     /**
      * Obtains the product series represented by a string.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const productSeries: string;
 
     /**
      * Obtains the product model represented by a string.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const productModel: string;
 
     /**
      * Obtains the software model represented by a string.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const softwareModel: string;
 
     /**
      * Obtains the hardware model represented by a string.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const hardwareModel: string;
 
     /**
      * Obtains the hardware profile represented by a string.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const hardwareProfile: string;
 
     /**
      * Obtains the device serial number represented by a string.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const serial: string;
 
     /**
      * Obtains the bootloader version number represented by a string.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const bootloaderVersion: string;
 
     /**
      * Obtains the application binary interface (Abi) list represented by a string.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const abiList: string;
 
     /**
      * Obtains the security patch level represented by a string.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const securityPatchTag: string;
 
     /**
      * Obtains the product version represented by a string.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const displayVersion: string;
 
     /**
      * Obtains the incremental version represented by a string.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const incrementalVersion: string;
@@ -132,14 +132,14 @@ declare namespace deviceInfo {
      *
      * <p>The OS release category can be {@code Release}, {@code Beta}, or {@code Canary}.
      * The specific release type may be {@code Release}, {@code Beta1}, or others alike.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const osReleaseType: string;
 
     /**
      * Obtains the OS version represented by a string.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const osFullName: string;
@@ -147,7 +147,7 @@ declare namespace deviceInfo {
     /**
      * Obtains the major (M) version number, which increases with any updates to the overall architecture.
      * <p>The M version number monotonically increases from 1 to 99.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const majorVersion: number;
@@ -156,7 +156,7 @@ declare namespace deviceInfo {
      * Obtains the senior (S) version number, which increases with any updates to the partial
      * architecture or major features.
      * <p>The S version number monotonically increases from 0 to 99.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const seniorVersion: number;
@@ -164,7 +164,7 @@ declare namespace deviceInfo {
     /**
      * Obtains the feature (F) version number, which increases with any planned new features.
      * <p>The F version number monotonically increases from 0 or 1 to 99.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const featureVersion: number;
@@ -172,69 +172,69 @@ declare namespace deviceInfo {
     /**
      * Obtains the build (B) version number, which increases with each new development build.
      * <p>The B version number monotonically increases from 0 or 1 to 999.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const buildVersion: number;
 
     /**
      * Obtains the SDK API version number.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const sdkApiVersion: number;
 
     /**
      * Obtains the first API version number.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const firstApiVersion: number;
 
     /**
      * Obtains the version ID by a string.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const versionId: string;
 
     /**
      * Obtains the build types of the same baseline code.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const buildType: string;
 
     /**
      * Obtains the different build user of the same baseline code.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const buildUser: string;
 
     /**
      * Obtains the different build host of the same baseline code.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const buildHost: string;
 
     /**
      * Obtains the build time.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const buildTime: string;
 
     /**
      * Obtains the version hash.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 6
      */
     const buildRootHash: string;
     /**
      * Obtains the device udid.
-     *
+     * @syscap SystemCapability.Startup.SysInfo
      * @since 7
      */
     const udid: string;
diff --git a/api/common/@system.device.d.ts b/api/common/@system.device.d.ts
new file mode 100644
index 0000000000000000000000000000000000000000..0704196daeadba15523c3e8a232dc4d1b0afbec5
--- /dev/null
+++ b/api/common/@system.device.d.ts
@@ -0,0 +1,152 @@
+/*
+ * Copyright (c) 2020 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.
+ */
+
+/**
+ * @syscap SystemCapability.Startup.SysInfo
+ */
+export interface DeviceResponse {
+  /**
+   * Brand.
+   * @syscap SystemCapability.Startup.SysInfo
+   * @since 3
+   */
+  brand: string;
+
+  /**
+   * Manufacturer.
+   * @syscap SystemCapability.Startup.SysInfo
+   * @since 3
+   */
+  manufacturer: string;
+
+  /**
+   * Model.
+   * @syscap SystemCapability.Startup.SysInfo
+   * @since 3
+   */
+  model: string;
+
+  /**
+   * Product number.
+   * @syscap SystemCapability.Startup.SysInfo
+   * @since 3
+   */
+  product: string;
+
+  /**
+   * System language.
+   * @syscap SystemCapability.Startup.SysInfo
+   * @since 4
+   */
+  language: string;
+
+  /**
+   * System region.
+   * @syscap SystemCapability.Startup.SysInfo
+   * @since 4
+   */
+  region: string;
+
+  /**
+   * Window width.
+   * @syscap SystemCapability.Startup.SysInfo
+   * @since 3
+   */
+  windowWidth: number;
+
+  /**
+   * Window Height.
+   * @syscap SystemCapability.Startup.SysInfo
+   * @since 3
+   */
+  windowHeight: number;
+
+  /**
+   * Screen density.
+   * @syscap SystemCapability.Startup.SysInfo
+   * @since 4
+   */
+  screenDensity: number;
+
+  /**
+   * Screen shape. The options are as follows:
+   * rect: Rectangle screen.
+   * circle: Circle screen.
+   * @syscap SystemCapability.Startup.SysInfo
+   * @since 4
+   */
+  screenShape: "rect" | "circle";
+
+  /**
+   * API version.
+   * @syscap SystemCapability.Startup.SysInfo
+   * @since 4
+   */
+  apiVersion: number;
+
+  /**
+   * Device type. The options are as follows:
+   * phone: smartphone
+   * tablet: tablet
+   * tv: smart TV
+   * wearable: wearable
+   * liteWearable: lite wearable
+   * ar: AR
+   * vr: virtual reality
+   * earphones: headset
+   * pc: personal computer
+   * speaker: speaker
+   * smartVision: smart visual device
+   * linkIoT: connection module
+   * @syscap SystemCapability.Startup.SysInfo
+   * @since 4
+   */
+  deviceType: string;
+}
+
+export interface GetDeviceOptions {
+  /**
+   * Called when the device information is obtained.
+   * @syscap SystemCapability.Startup.SysInfo
+   * @since 3
+   */
+  success?: (data: DeviceResponse) => void;
+
+  /**
+   * Called when the device information fails to be obtained.
+   * @syscap SystemCapability.Startup.SysInfo
+   * @since 3
+   */
+  fail?: (data: any, code: number) => void;
+
+  /**
+   * Called when the execution is completed.
+   * @syscap SystemCapability.Startup.SysInfo
+   * @since 3
+   */
+  complete?: () => void;
+}
+
+/**
+ * getInfo interface
+ */
+export default class Device {
+  /**
+   * Obtains the device information.
+   * @syscap SystemCapability.Startup.SysInfo
+   * @param options Options.
+   */
+  static getInfo(options?: GetDeviceOptions): void;
+}