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Traditional industrial valve positioners have shortcomings such as low control accuracy, high power consumption, single control mode, and easy jittering of valve positions. They must be debugged on site during use to further to adapt into production requirements. In order to improve the adaptability of the valve positioner control system, an in-depth study of the control algorithm was carried out, and a low-power valve positioner based on STM32 chip was designed. The hardware design takes STM32L152 chip as the control core, peripheral circuits include 4-20mA to 3.3V power supply circuit, opening/displacement signal conversion circuit, human-computer interaction module circuit; software design adopts adaptive immune fuzzy PID algorithm to replace conventional PID algorithm, and realizes the self-tuning of valve position control parameters. The generalized transfer function of the mathematical model of the valve mechanism is constructed in MATLAB, and the simulation circuit is built. Finally, it is concluded that the adjustment time of the control system is only 0.8s, and there is no overshoot during the entire control process. Effectively improve the control accuracy of the valve and avoid the jitter phenomenon of the valve position.