Experience during e-Commerce activities will greatly influence people’s buying behavior. In this paper, thekey points of doing commerce over 3D virtual world arestudied, a systematic method of designing e-commerceexperience in 3D virtual world is designed which is named C2V (Commerce to Virtual Worlds). A commerce scenario isdecomposed into roles and scenes, and then captured byPerformative Structure graph. The Performative Structuregraph is then transformed into rectangular dualization layout through Rectangular Dualization algorithm. By using a real use case (1st World Youth Olympic Game to be hosted by Singapore) to apply the designed method, the feasibility of our new method is proved.