A method research of intention expression based on design state

Computer aided design system has provided effective help in alleviating the designer with heavy manual labor and raising efficiency and quality, but not in the field of industrial design for designer with professional support, mainly because the present software couldn't remain synchronization with designer's intention. In this paper, response to the requirements of providing dynamic design resources, expression is researched from the view of design state, and by the demand and analysis traces the design process history information, design intentions expression method is researched on the basis of design state, at last design intention expression model is built.