Abstract: Because of wireless sensor networks can realize integration of processing,storage,sensing and communication on small-scale and low-cost devices,it is widely applied in fields of environmental monitoring.On the basis of analyzing the existing defaults of present monitoring technique of coal spontaneous combustion sources,the paper put forward a monitoring system for coal spontaneous combustion source based on WSN.It introduced design of structure,sensor nodes and access gateway nodes of the system,and gave software design of micro-sensor nodes.The system can achieve temperature detection for special area that existing wire system couldn’t implement,and improve safety production level of coal mine effectively.