With construction and development of the ecological cities and green buildings, the building education should actively integrate related contents to the old teaching system. The building performance simulation technology can provide technology support for design of green buildings. This paper lists features and application of performance simulation software of different buildings, introduces teaching process on the preparation phase, middle phase and achievement phase in the graduation design courses of green buildings, applies digital technologies on different phases, summarizes problems and experiences in teaching, and proposes the recommendation for establishing green building teaching system.