The main research content of computer graphics is to study how to represent graphics in computers and related principles and algorithms that use computers to calculate, process, and display graphics. Graphics are usually composed of geometric elements such as points, lines, faces, and bodies, as well as non-geometric properties such as gray scale, color, line type, and line width.

The development of CAD also shows the trend of intelligence. According to most popular CAD software at present, the main function is to support the drawing and output of the product's subsequent stages. The product design function is relatively weak, and the most commonly used function of AutoCAD is interactive drawing.