Based on the survey of existing research work on collaborative design and on our experiences and work in product growth design theory, a feasible approach—collaborative product growth design method to integrate the genetic engineering methodology, collaborating tools and web based information into the automatic design activity has been proposed in this paper. Firstly, the product growth design strategy and its characteristics are studied based on automation technology in the product structure design. Then, to guarantee a successful transformation and good use of existing product data and related product series on internet, the information exchange model and web based virtual design gene pool model in the process of product growth design are put forward. Finally, the mechanism of the combination of product growth design and collaborative design process are described, and the framework of collaborative design based product growth design system is introduced. Through theoretical study and hard development work interesting and useful results have been obtained.