Abstract: In order to further improve the comprehensive efficiency of agricultural irrigation system in our country and embody the advanced and scientific nature of intelligent irrigation, the operation system based on the precise control model was proposed to design and optimize and the Internet of things technology as the main support platform. By introducing the powerful systematic architecture of the Internet of Things, standardizing and strengthening the deployment and cooperation relationship of each network node, scientifically building the mathematical model for realizing precision irrigation control, and introducing reasonable system software design program and hardware functional component configuration, a complete integrated agricultural intelligent irrigation system was formed for the practical operation. The results showed that before and after the application of the precision control model based on the Internet of Things platform technology, the overall operation efficiency of the irrigation system had been significantly improved, the system accuracy and the system response rate had been relatively increased by 6.25% and 7.68% respectively, the action delay rate had been relatively reduced by 2.72%, and the irrigation water-saving efficiency of the system had been increased to 91.50%. The practical application effect of the precision control model under the Internet of Things platform was good, and its design concept correctly would be realizing the principles of irrigation uniformity and rationalization, It would be become an important development direction of energy conservation and consumption reduction in the field of irrigation.