One kind of coal mine monitor and control station is designed based on ARM7 microcontroller according to the important function in coal mine safety. The substation consists of sensors data acquisition circuit, ARM7 microchip with integrated CAN controller, CAN interface circuit. The ARM7 microcontroller with the real-time operation system uC/OS-Ⅱ to handle the data collected by sensors, and communicate with the monitoring center by CAN bus.