A smart LED car light that integrates lighting and information display is proposed to address the shortcomings of weak information transmission ability and less intuitive information exchange in current car light. On the basis of proposing the overall design scheme for the transformation of the automotive lighting path and the intelligent control system, the transmission performance and reliability of the light path were simulated and optimized by using the multi physics field finite element simulation software COMSOL. Finally, key components such as lenses were customized based on the simulation results and a prototype of the automotive lighting experiment was made. Through experimental testing, it has been confirmed that the intelligent LED car light efficiently realizes clear and intuitive information exchange between people, vehicles, and the environment, effectively improving the safety of car driving, and has the advantages of strong compatibility, low cost, and high intelligence. Its design can provide new ideas for the development of autonomous driving technology.