The article presents the fruits of the study on distributed integrated environment of virtual reality application in our country, and DVENET, the first distributed integrated environment of virtual reality application based on computer WAN in our contry, which is mainly composed of the environment system and a series of development tools. By the environment system and development tools, we can rapidly establish applied virtual reality system, and master the study method on virtual reality. The article also points out a series of essential theory problems to be solved. Any break-through in these problems will enhance the progress in VR technology, distributed virtual environment and practical degree. It is a study field full of energy and challenges.