Abstract: In order to improve the efficiency of irrigation and fertilization in farmland, optimize production process and improve soil ecological environment, the integrated system for crop water and fertilizer was developed basing on the intelligent agricultural technology of internet of things. On the basis of analyzing the principle of the Internet of things and overall framework of the system construction, the application of the system was divided into two modules:the farmland environmental monitoring system and the integrated system of water and fertilizer.The farmland environmental monitoring system could monitor the data of water and fertilizer environment in farmland that based on the wireless sensor network, and adopted integrated acquisition node design which could provide data support for the control of irrigation and fertilization.The integrated system for water and fertilizer was developed with configuration software basing on the construction of the first part of the system,the pipe network system and the control system,, and it could realize the intelligent control of irrigation and fertilization, data analysis and query in farmland through the setting of the principle flow.