Lighting, as one of the important elements in the design of public space, has attracted the attention and study of architects and scholars for a long time. By controlling the lighting environment in the area, the lighting can increase the effect of decoration, enrich the atmosphere, bring a transparent, bright and open visual image, and adjust the color around the area to provide an attractive space atmosphere. The reasonable use of lighting has become the important link in the design process of public space. By using the light to determine the depth and color, the lines, the different angle of view, and also can adjust the atmosphere of the space, rendering a more natural, harmonious and beautiful atmosphere and environment and create a modern and stylish space atmosphere. In addition, good lighting design can also provide the correct and comfortable lighting for the different activities in the area, thus achieving the purpose of architecural designing. For the lighting design of public space, it can make the light comfortable for people, beautify the environment, and also facilitate the safe evacuation in emergencies. At present, various light sources are widely used in public space lighting, such as LED (Light Emitting Diode), incandescent lamp, fluorescent lamp, sodium lamp, etc., LED lighting is gradually being used in space lighting due to its energy-saving and environmental protection, long service life, low construction cost, easy installation (wired and wireless) and other characteristics. To sum up, lighting is an important element in the design of public space, it has many functions and can create different atmospheres in different environments. The correct use of lighting and its design can bring two-dimensional visual effects as well as three-dimensional effects and enhance the beauty of the place, hence emphasizing the beauty of the place.