Because of the rapid development of wireless sensor network, it widely applied in all areas of life, in-depth study of the technology will also explore the potential application of more in-depth. The main research of WSN technology in some environment in the real world information acquisition and processing technology, it realizes the intercommunication of the real world and the Internet world, opened the human WSN network era. WSN network through the digital world com. Human concepts inherent information world and explore the objective facts, from the inquiry from change the people and things in nature, the data are the basic objects interactively; the sensor node has sensing effect in direct contact with the objective environment, continuously enhance the practical function of virtual networks, but also increase the capacity of human understanding of the objective world; through the real-time sensing and found the state change monitoring target, at the same time the collection of data processing, the processing of useful information through the wireless transmission mode is transmitted to a data collection center or client. It will make the development and wide application in various fields of social life are more intelligent and modernization. Although its development still in an immature stage, Tan of many problems still has not obtained the very good solution, research work on WSN is far from over. In this paper the concept and system structure of wireless sensor network analysis began to design, application system based on wireless sensor network monitoring farmland use temperature and humidity ZigBee as an example to study the development process of application system for wireless sensor networks
