The problem of water scarcity has become one of the major problems facing our country, in order to make rational use of water resources and make agricultural production sustainable. At the end of the last century, relevant scholars and experts raised the issue of fine management of irrigated agriculture. The intelligent farmland irrigation water-saving system is a scientific and technological product based on the development of science and technology and environmental protection. Through the microprocessor system, an intelligent irrigation water-saving system that can automatically adjust the gate and information communication is designed. The problem of economic loss caused by waste of water and reduced production due to old-fashioned irrigation methods has been solved. The central computer equipped with a central monitoring system will automatically handle various problems arising from irrigation. The realization of the intelligent control system is to combine the human way of thinking with hardware and software, and it only needs the intervention of human beings to automate the running system. The whole intelligent farmland water-saving irrigation system consists of two parts: hardware and software. The hardware system includes single-chip core controller, wireless transmitting and receiving module, various sensors, human-computer interaction system, etc., and the software system adopts C language programming.