In this study, an intellectual prealarm system of mine shaft based on digital optical, ZigBee technical and power carrier communication was proposed, which focused on the mine accidents’ frequent breakout. The whole system consists of three modules: infrared sensor network, ZigBee wireless sensor network and storing and transmitting system based on ARM. And this system has some significant advantages. Firstly, this system can monitor the environment parameters of underground and know the workers’ position information in time. Secondly, this system can avoid the transmission obstacles of underground and multipath interference and it satisfies the nation’s intrinsically safe specification well. Thirdly, this system can warn when the environment is dangerous and give the workers an ability to raise the alarm actively. In a word, this system is good for the improvement of warn and rescue in underground.