Water and rainfall monitoring system is the main part of mountain torrent disaster monitoring and early warning system, mainly including water and rainfall monitoring stations, information collection, communication network for information transmission, etc. Most of the information transmission networks choose GPRS, but the general communication in monitoring areas is not often covered well, and in the event of disasters the ground communication base stations are easy to be destroyed, thus leading to communication interruption. BDStar satellite communication link has a wide coverage, and is not affected by natural disasters. Using BDStar data transmission terminal to connect RTU and using solar panels and batteries for power supply can return the real-time water and rainfall information via satellite link, greatly improving the reliability of mountain torrent disaster early warning system.