Abstract: The paper analyzed problems of current gas monitoring system, pointed out that fixed gas monitoring system has blind spot and inconvenient maintenance, and mobile gas monitoring system ca't connect to network and has information island. It described a wireless mobile gas monitoring system which adds a wireless communication module in portable gas detector, realizes continuous coverage of underground wireless signal by sub-station, wireless signal transceiver and leaky cable, and solves the problem of positioning of portable gas detector by arranging a certain number of locators in working faces and other places. Wireless mobile gas monitoring system realizes centralized and unified management of portable gas detectors and real-time and automatic upload of gas detection data.