Abstract: In order to transfer information of underground personnels, devices and environment to information center of coal mine through existing underground communication network, the paper put forward a design scheme of mine-used M2M terminal system based on WCDMA, and introduced hardware and software design of the system in details. The system realizes functions of information acquisition of underground targets, human-computer interaction operation and data communication, and realizes Internet of Things of things and things, things and people, and things and network by transmitting data through WCDMA.