This paper introduces the hardware design and the position control method of a valve positioner based on ARM microcontroller. On the one hand, the selection of ARM with CAN interface of Philips as the core controller can not only satisfy the calculation and collection of real-time data, but also keep a real-time communication between the valve controller and the host computer. On the other hand, the design of control method with intelligent integral and self-learning fuzzy controller improves the intelligent level and the position precision of this valve.