With the development of science and technology, the demand for high quality power supply electrical equipment increasing application of analog circuit Control Research and Application Development of power for many years already, but it still has many shortcomings. FPGA as a highly integrated, economical, high speed, low power consumption, it is easy to develop and maintain a significant advantage (upgrades) and the like. And faster, more integrated, more versatile, and other advantages, stand out from the MCU and DSP integrated circuits, etc., become the research and application in the field of power electronics control hot spots. Briefly introduces the basic theory of digital systems, we analyze the structure model of digital systems. There is an overview of the design method of digital control system, the completion of the selected device selection and related development environment and tools. This paper proposes all-digital power control scheme of special surface treatment, and the completion of the controller hardware and software design and implementation.