Now domestic coal mine synthetical-exploit underground Automaticmonitoring system commonly has many problems such as the relatively independent operation of subsystem, poor real-time communication and stability. Therefore, the paper based on the Synthetical-exploit underground working face process in order to realize the main production equipment’s on-line monitoring and control, environmental parameters’ acquisition and monitoring and fault processing. Through the establishing Siemens S7-300 PLC main control station and the intelligence passive station, design a set of application of synthetical-exploit underground automatic monitoring ystem. The actual test show that the system is provided with good stability, high reliability for coal mine safety and efficiency of the production with the role which cannot be replaced.