Abstract: The communication quality of automatic terminal directly affects the remote monitoring and automatic control. It has become the top priority in the construction of automatic terminals in the new era. In order to improve the communication and management efficiency of the management machine to the terminal screen and ensure the convenient access and safety of wireless data communication between near-field point-to-point devices, a Bluetooth data transmission device adapted to automatic terminal communication is proposed. Add inter device authentication and communication data encryption during bidirectional Bluetooth transmission. Improve the reliability, stability and efficiency of communication.