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Beidou No.3 system has been completed in December 2018 and started to provide global services. Beidou short message application will soon cover the world. Because there is no special receiver for Beidou System in some special environment, it is inconvenient to equip the receiver. In order to make the communication contact normal, based on the data interface 2.1 protocol of Beidou No.1 user machine, the paper studies the short message and fixed telephone voice communication service system of Beidou with STM32 Series MCU as the data processing unit, focusing on the two parts of system hardware and software And design. This system uses Beidou telephone gateway to realize the interconnection between Beidou short message and fixed line telephone or mobile phone. It solves the problem that the normal communication can not be carried out without the special environment of receiver or without using the receiver, as well as the problem of safety, reliability and limitation based on Beidou short message communication. At the same time, it expands the communication application scope of Beidou short message Wai.