Distributed Virtual Reality technology (referred to as VR) is a type of virtual reality system, and it is a fusion of Network technology and virtual reality technology. It enables users in different locations to participate in a virtual environment at the same time. The users can complete a common task by multi-media interactive means. The basic characteristic of Distributed Virtual Reality System is shared virtual workspace, pseudo-physical realistic of behavior, supporting real-time interaction and sharing clock, communicating with each other in many ways, sharing resources and information, ...