This paper puts forward a model for VRML-based cooperative system in multi-user shared virtual environment. The model adopts B/S structure, designs the workflow of model，and lays emphases on the key technology for virtual scene and avatar, VRML scene communication, the model’s cooperative and parallel control and the database interconnection. It can realize the consistency of scence, the timeliness of network communication and the authenticity of avater in multi-user shared virtual environment.Its feasibility is validated through the implementation of a prototype system.