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In order to meet the extremely high standards of smart valves in industrial production, this paper studies smart valve design and control methods, and designs smart valve hardware systems, including electrical conversion modules, microprocessors, signal processing modules and valve position feedback modules. Part, with the main controller LPC2290 as the core, and the A/D converter and CAN bus for communication, the intelligent valve control function is realized. In order to improve the accuracy of the intelligent valve control, this article uses the PID controller and the FUZZY-PI compound algorithm , Through the basic principles of PID control and the process of tuning PID control parameters by the stable boundary method, complete the design of the PID controller, and then combine the FUZZY-PI compound algorithm to realize the deviation judgment and condition control of the intelligent valve and the conversion of multiple conversion switches and signals. , Realize the high-precision control of the smart valve, and finally design the smart valve positioner system to realize the precise positioning and self-diagnosis function of the smart valve. Experiments show that the system studied in this paper can achieve control stability and control accuracy in 4s. It can be as high as 95%.