Abstract: The paper proposed coal mine communication technology system which was consisted of mine wired dispatching communication system, mine mobile communication system, mine broadcast communication system and mine rescue communication system. It proposed that mine dispatching communication system should use mine wired dispatching communication system. It proposed that all mine mobile communication system should use communication technologies such as WiFi, 3G and 4G. It proposed that mine broadcast communication system can use either remote powered broadcast technology of mine wired dispatching communication system, or IP communication technology based on Ethernet and passive optical network. It proposed that mine rescue communication system should use wireless multimedia communication technology, and should use communication technologies such as WiFi and MESH. It proposed that mine mobile communication system should meet the demand for mobile phone off network, base station off network, access of coal mine wired broadband transmission platform. It pointed out that WiFi is superior to WCDMA, CDMA2000 and TD-SCDMA for communication of mobile phone off network, access of coal mine wired broadband transmission platform, wireless ad hoc networks, mine-used wireless camera, communication of base station off network, multifunction mine mobile communication system and mine wireless broadband transmission. It proposed that WiFi should be used for multifunction mine mobile communication system and mine wireless broadband transmission.