Intelligent building design method and system based on BIM

The invention discloses a BIM-based intelligent building design method and system, and the method comprises the steps: obtaining an original BIM model, determining reasonable model design parameters according to the user-defined house type of a user, generating a first building design prototype according to the model design parameters, and generating a second building design prototype according to the first building design prototype; the method comprises the steps of obtaining a first building design prototype, performing structure and cost analysis on the first building design prototype based on a big data analysis algorithm to obtain an analysis result, improving the first building design prototype according to the analysis result to obtain a second building design prototype, and generating a BIM combination model according to the second building design prototype. By intelligently analyzing the first building design prototype corresponding to the user-defined house type of the user, the safety and economic