Interior design is a kind of complex art form, which combines different art elements with each other through advanced thinking concepts, also known as “plastic art“. The art elements in interior design are mainly divided into three aspects: space elements, color elements and aesthetic decoration elements. In modern interior design, designers are required to break the single form of architectural space, make rational use of the basic structure of the building, surpass the existing form, and create more practical and beautiful creative space. Space elements play an important role in modern interior design. How to use the existing space reasonably and design beautiful is an important method to test designers. Interior color matching has higher requirements for interior design. It not only plays a key role in the creation of interior space, but also has a great impact on the development of residents’ mood and character. The purpose of using different spaces also needs different colors to match. The space creates different space atmosphere for the use requirements and colors of colors, and they influence each other. For example, office area, business area and hospital, because their use purposes are different, so the color matching should also have some differences. The size of the space also affects the use of color. The deep color is suitable for large space, which can increase the indoor sense of heaviness; the color with high saturation is more suitable for the open living environment; the area with small space can adopt warm color, which can improve the brightness of the space and give people a warm feeling. The use of color also needs to be selected according to users of different ages. For example, if the elderly like quiet, they need to use strong colors; compared with children, they are more suitable for bright and cheerful colors.