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Wireless sensor networks (WSNs) are a family of wireless network consisting of spadally distributed autonomous devices using sensors to cooperatively monitor physical or environmental conditions, such as temperature, vibration, pressure, motion or pollutants, at different locations. Applications based on sensor networks are finding their way into numerous important domains including transportation systems, precision agriculture and battlefield monitoring. In this paper, the concept and characteristics of wireless sensor networks are introduced, and the design of the control system in emergency generator set based on ZigBee wireless network communication technology is discussed. The research findings shows that the features of nodes and network are excellent, and the ZigBee technology is a good solution to realize wirless sensor network.