Abstract: After 30 years of rapid development, Shendong Mining Area forms large range of goaf, and most mined goafs are far from the wellhead (more than 10 km). There are the issues of long distance of pumping, serious leakage of beam pipe, poor maintenance of beam tube, easy absorbing flat of beam tube by using traditional ground beam tube system to monitor representative gas of goaf fire. For these problems, Shendong Mining Area, through the exploration and innovation, introduces infrared beam tube monitoring system and improves the technique of the system. JSG4 mine fire beam tube monitoring system substations are established in underground electrical chamber and distributor points (optimum pumping distance of 2 km). According to the characteristics of Shendong mines and long distance of air pump (5 km), monitoring sites are set up in the nearest location of monitoring object, and the air pump and infrared monitoring substation are set up to monitor goaf data which are transmitted to the ground through the optical fiber to achieve all-weather and real-time monitoring and early warning for gob fire sign gas.