Abstract: AEC(Architecture, Engineering and Constructions)Design has particular requirements for graph. The paper proposed several questions about graphic platform, made it modular, and took a preliminary study on the functional dividing and relations between different modules.Based on the inheritance of object-orient language, the paper built a class library which is fit for graphic platform.According to the principle of what you see is what you get, the paper implemented a base-face locating method.Using the OpenGL buffer extension, the paper implemented a method of dynamic displaying, and built a file format for compressed texture that Can accelerate the process of texture bind.On the basis of testing, the paper compared the effect and speed of Multi-samples and Alpha on anti-aliasing, and concluded that Multi-samples has better performance than Alpha Oil anti-aliasing.The paper implemented a floating tip using Windows Dialog and text control, which Can move the following mouse on the screen. State snap is risen which extends the scope of traditional snap.After analyzing the computer hardware and graphic applying, the paper concluded the application trend of 3D modeling.