A wearable device is disclosed, including a microprocessor control unit, a first switch module, a Bluetooth module, and a multimedia module. The wearable device can be connected to a terminal device by using the Bluetooth module to share data, use data locally stored in the multimedia module, and monitor data corresponding to a preset event by using the microprocessor control unit. The wearable device integrates multiple functions, and connections between the modules can be switched according to an application scenario of the wearable device, to implement a quick transition between the functions, and to improve intelligence of man-machine interaction.