On account of the IICS (integrated information composition structure) and the MIPC (multi-dimensional information processing capabilities) of BIM(Building Information Management), this paper concludes that the work efficiency of architectural design will be greatly improved after using BIM software. Firstly, this paper clarifies how the structure itself of IICS contributes to the level of efficiency improvement. In order to get a visual display of quantitative information, the same model is constructed by TANGENT Architecture (T), AutoCAD (C) and ArchiCAD (A) respectively. After that, number of mouse clicks is counted in the whole process, and obtained results that: (1) The ratio of the number of mouse clicks by the three software to create the model is T: C: A≈12:16:1; (2) The ratio of creating drawings is T: C: A≈1.71:1.90:1; (3) It is clear that the efficiency of BIM application is the highest in the preliminary design phase compares with the scheme design phase and the detailed design phase; (4) By calculating the amplification in the number of mouse clicks, it is more convenient to use BIM to modify the design. Furthermore, according to the prior work results on a single dimension and a single specialty, in this paper, it is predicted that the BIM work efficiency will improve greatly with wider applications due to MIPC.