In order to push the informationization process of the building industry,promote sustainable architectural design and enhance the competitiveness of China's building industry,the authors study BIM(Building Information Modeling) based on intelligent parametric modeling technology.BIM is a new technology in the field of computer aided architectural design,which contains not only geometric data but also the great amount of engineering data throughout the lifecycle of a building.The authors also compare BIM technology with 2D CAD technology,and demonstrate the advantages and characteristics of intelligent parametric modeling technology.BIM,which is based on intelligent parametric modeling technology,will certainly replace traditional computer aided architectural design and become a new driving force to push forward China's building industry in this Information Age.