Present computer aided design software which is used to develop products are usually isolated systems,so that its application in product development seems to form "information islands".The functions can not work effectively and efficiently when it is used to design products.In order to solve this problem,this paper takes the client-oriented products as research subjects and suggests Internet-based computer aided product conceptual design method,which utilizes the PDM technique to integrate disperse and isolated information into the Internet product conceptual design system.This study involves the key techniques such as ICACD system,integrating information,concurrent design,coordination design in different places,evaluation of design and so on.