Abstract: For coal mine gas outburst, gas or dust explosion, fire and other accidents in mines, we develop a kind of long-distance detection system. The system contains pneumatic transmitters, environmental sensors, data receivers, repeaters. Pneumatic transmitters launch the environment sensors to the disaster area, environmental sensors can measure the environment parameters of the disaster area, and then the environment sensors send those data to the data receiver. The data receivers display the environment parameters or send them to the rescuing command side by the repeaters, which provides important information for disaster area detection and rescue.