In order to evaluate the addiction severity and the effect of rehabilitation objectively, this study develops a virtual environment model based on the virtual reality technique, making the subjects in a drug related or neutral scene , at the same time recording the physical signs and eye movements index. Reliability and validity of this system will also be tested in this study. And we will construct the norm of addiction assessment system in Shanghai .The evaluating system will be very beneficial to develop novel and practical assessment for synthetic durg related disorder, and provide a reference for other drug dependence diagnosis.