A real-time monitoring and pre -warning system has been established in Xinqiao pyrite mine. 3S and smart monitoring technology is broadly applied in the field for their advantages. The system is integrated by the database management subsystem, smart monitoring subsystem and early warning subsystem. It can accomplish monitoring data analysis and forecast in point or district. The location of monitoring points and the main methods are introduced in detail and the key techniques about data transmission and processing have been designed successfully which find a way out of the difficulty on the condition that the circumstance is bad and the monitoring signal is interfered strongly in long haul transmission. Through this system remote controlling and real-time prediction can be realized easily. So it has great application value to study the system.