In order to ensure the stable operation of safety monitoring system, according to the content requirements of ' coal mine safety monitoring system upgrading and transformation technical scheme ' issued by the state, through the upgrading and transformation of safety monitoring system in Xingdong Coal Mine and the realization of multi-system integration with personnel positioning system and emergency broadcasting system. By analyzing the difference between ground fusion and underground fusion, Xingdong Mine adopts ground fusion method for multi-system fusion to realize the interactive linkage effect after gas overrun, ensure the personal safety of workers in Xingdong Mine, and improve the two functions of monitoring system ' supervision ' and ' control '.