In order to obtain the required measuring accurate information, usually in the measurement area, decorate a lot of sensor nodes, some even reached tens of thousands of, for example in the primitive forest used to detect the fire and the ecological condition of the sensor network, sensor nodes are numerous, the short distance between the nodes, so that you can make the information more authenticity, to improve the precision of the detection information, which is due to the damage of a single sensor node affect finishing testing, redundancy, reduced the monitoring blind area, this is the advantages of using sensor network to monitor. Normally, we according to the function of the sensor network is divided into self-organizing network, dynamic network, reliable network and application related to the network.