Abstract:An analysis was made of the integrated process and characteristics of building information modeling(BIM) data model.The complexity of the modeling and repetitiveness of the information conversion owing to different disciplines were illustrated by various representation of building components.Based on the research,an integrated framework system,namely architectural and structural information model(ASIM),was presented for facilitating collaborative design between architects and structural engineers.The ASIM system is capable of transforming data information from architectural model to structural model by developing an information conversion platform,and has the expansibility,compatibility,phase and other characteristics.The system provides some technical supports for development of the next generation building software based on BIM.