A first Bluetooth adapter is disposed in a Bluetooth shield body (10), and a second Bluetooth adapter(20) that has a Bluetooth pairing with the first Bluetooth adapter is built in a housing (11). When communication with a terminal device is required, the second Bluetooth adapter (20) is pulled out, and a male interface (21) of the second Bluetooth adapter (20) is inserted into a first female interface of the terminal device, so that the body (10) performs Bluetooth communication with the terminal device to implement a wireless connection. The Bluetooth shield has a compact structure, and can communicate with a terminal device without a data cable, thereby avoiding the condition in which an excessively short data cable of an existing Bluetooth shield is inconvenient to use and an excessively long data cable of an existing Bluetooth shield is inconvenient to carry.
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