diff --git a/api/@ohos.multimodalInput.inputDevice.d.ts b/api/@ohos.multimodalInput.inputDevice.d.ts
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+/*
+* 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
+*
+* 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 } from './basic';
+
+ /**
+ * The input device management module is configured to obtain an ID and device information of an input device.
+ *
+ * @since 8
+ * @sysCap SystemCapability.MultimodalInput.MULTIMODAL_INPUT
+ * @devices phone, tablet, tv, wearable
+ * @import import inputDevice from '@ohos.multimodalInput.inputDevice';
+ * @permission N/A
+ */
+
+declare namespace inputDevice {
+    type SourceType = 'keyboard' | 'mouse' | 'touchpad' | 'touchscreen' | 'joystick' | 'trackball';
+
+    type AxisType = 'NULL';
+
+    /**
+     * Defines axis information about events that can be reported by an input device.
+     * For example, a touchscreen may report information such as x, y, and pressure,
+     * which indicate the x-axis coordinate, y-axis coordinate, and pressure, respectively.
+     *
+     * @sysCap SystemCapability.MultimodalInput.MULTIMODAL_INPUT
+     * @param source Input source type of the axis. For example, if a mouse reports an x-axis event, the source of the x-axis is the mouse.
+     * @param axis Type of the axis. for example, the x-axis, y-axis, and pressure axis.
+     * @param max Maximum value of the data reported on this axis.
+     * @param min Minimum value of the data reported on this axis.
+     */
+    interface AxisRange {
+        source: SourceType;
+        axis : AxisType;
+        max : number;
+        min: number;
+    }
+
+    /**
+     * Defines the information about an input device.
+     *
+     * @sysCap SystemCapability.MultimodalInput.MULTIMODAL_INPUT
+     * @param name Name of the input device.
+     * @param sources Source type supported by the input device. For example, if a keyboard is attached with a touchpad, the device has two input sources: keyboard and touchpad.
+     */
+    interface InputDeviceData {
+        id: number;
+        name: string;
+        sources : Array<SourceType>;
+        axisRanges : Array<AxisRange>;
+    }
+
+    /**
+     * Obtains the IDs of all input devices.
+     *
+     * @since 8
+     * @sysCap SystemCapability.MultimodalInput.MULTIMODAL_INPUT
+     * @devices phone, tablet, tv, wearable
+     * @permission N/A
+     * @param callback callback function, receive reported data
+     */
+    function getDeviceIds(callback: AsyncCallback<Array<number>>): void;
+
+    /**
+     * Obtain the information about an input device.
+     *
+     * @since 8
+     * @sysCap SystemCapability.MultimodalInput.MULTIMODAL_INPUT
+     * @devices phone, tablet, tv, wearable
+     * @permission N/A
+     * @param deviceId ID of the input device whose information is to be obtained.
+     * @param callback callback function, receive reported data
+     */
+    function getDevice(deviceId: number, callback: AsyncCallback<InputDeviceData>): void;
+}
+
+export default inputDevice;
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