Abstract: Today, how to provide customizable products to meet the increased needs of customers is very important for an enterprise. In this paper, we describe a VRML2 and Java-based software system for three-dimensional interactive Web sites in e-commerce activity. A prototype system for beach-car customization shopping is demonstrated. This system is based on B/S mode. The front-end is composed of VRML-browser and Java-Applet-embedded web pages. Customers can move or rotate the product model in the VRML browser, and customization is achieved throw the interaction of VRML browser and Java Applet using External Authoring Interface. Communications between client and server are accomplished based on Java RMI, and JDBC is used to operate the Database. Compared with traditional e-commerce model, this system enriches the contents of web sites and helps customers to know the products better, and consequently, increases their shopping interests.