Orienting to the needs of future digital unmanned mine for on-line long-distance monitoring and fault diagnosis,a comprehensive monitoring system adapting to the locating of underground moving equipments and inspecting staffs and the state monitoring and fault diagnosis of underground fixed equipments and moving equipments was developed.The monitoring system is based on CAN bus,includes I/O for main working parameter of underground equipments,wireless data transmission terminals for moving targets,fixed wireless data transmission base station,communication protocol and surface monitoring and failure diagnosis station and so on.We do those work with a view to conducting pioneering technical research in the field and promoting technical progress of domestic mining industry.