This paper introduces the traditional using single chip microcomputer control LED and displays design methods based on PSoC technology with the LED display design different methods. It expounds the PSoC technology in the design of LED dot matrix and displays system advantages. It takes PSoC series CY8C27443 chips as the core of LED dot matrix display system for example and Describes PSoC Multi-functional concise type size of LED dot matrix system hardware configuration and software design and PSoC function of the specific design method. Because of the CY8C27443 chip internal resources are much rich so the design of LED dot matrix system than 51MCU circuit is not only simple and stable performance but also easy in the software design. Therefore, this system can save the developing cycle and cost.