BIM technologies and tools are developed very fast these years, which provide an effective and efficient method to solve the "segment"problem in building industry. However, since data exchange is still mostly based on files, an integrated BIM containing all the information of multi-disciplinary can't be constructed, so that much value of a BIM is hard to achieve. For constructing an integrated BIM, this paper proposes a framework of the modeling technology for integrated BIM, which enables integrating information generated in difference phases dynamically. The framework includes architecture, modeling flows, deployment framework and key technologies needed to be solved. After that, a prototype system of BIM data integration and server platform (BIMDISP, a BIM Server) is developed. Then a real word project is applied in the BIMDISP to test performance of the modeling technology. As a conclusion, the modeling technology proposed is feasible to support integration, management and sharing of all the building information, so as to generate an integrated BIM.