With the sharpness of market competition, the design of automobile outline becomes more and more important. By far, no systematic method can direct designers to carry out creative design orderly. In fact, most of the instances are created by designers’ cerebrum independently. The rise of the evolution computation provides us a new approach for conceptual creative design; therefore, it has become one of the most important techniques for computational and creative design. This paper pays more attention to the computer aided environment in the automobile outline design, proposes the automobile outline modularization design method and classifies component base into two categories. This method stores the data in the format of XML, which can save great memory and amount of rebuild component time.