Abstract: The characteristics of mine mobile communication and communication systems of mine leakage,induction,through-the-earth,PHS,CDMA and so on were analyzed.The network structures named wire/wireless converter plus base station and base station plus switch were proposed.WiFi mine mobile communication system was proposed and developed successfully.The key problems of science and technology of mine mobile communication were proposed,which were theory of mine wireless communication,theory of mine-used intrinsic safety and explosion-proof of radio and antenna,network structure,modulation method,signaling and so on of mine mobile communication.