BIM data lightweight method and system

According to the BIM data lightweight method and system provided by the invention, on the basis of a browser/server architecture, BIM components are traversed, the components are analyzed one by one, an instantiation method and a geometric registration mode are adopted, and finally BIM data lightweight display rendering is realized at a cloud end. According to the method, the rvt file is uploaded through a Web browser, the data format conversion and lightweight processing processes are completed at the cloud, secondary development is performed based on Autodesk Revit Api, BIM components of the rvt file are analyzed and subjected to lightweight processing at the server side, and the BIM components are stored in a glTF format of Draco compression, so that geometric information in an original file can be reserved, and the data format conversion and lightweight processing processes can be completed at the cloud. And real texture material information and attribute information of each component can be reserved. The