With the rapid development of society, the traditional lighting system has not been able to meet the green concept advocated by people for energy conservation and environmental protection. In recent years, the application of semiconductors has become more and more extensive, gradually replacing the traditional lighting system. LED intelligent lighting systems are one of the most common semiconductor applications today. In this paper, the fuzzy expert library is used to process multi-sensor data, and the illumination state of the LED can be intelligently processed according to different environments to meet the requirements of adjustment at any time. The fuzzy expert library decision module uses the single-chip STM32F103C8T6 as the main controller, and uses multi-sensor data fusion technology to control the current output of the HV9910B chip by outputting appropriate PWM waves through various control strategies, so as to realise dimming of the LED. Moreover, the intelligent lighting system can make full use of the sunlight, and fully intelligentises the power consumption of the lighting system to a minimum, thereby playing the role of energy saving and environmental protection.