Reuse judgment method and system of BIM (Building Information Modeling) model

The invention discloses a reuse judgment method and system of a BIM model, and relates to the technical field of BIM. The method comprises the steps that bounding box size judgment, element type judgment, entity type judgment, entity surface area judgment, grid material judgment and grid point cloud judgment are conducted on elements of two BIM models, and when judgment results are the same, the two elements are the same. The method is suitable for reuse judgment of a large number of BIM models in Microstation software, simple, efficient and effective geometric identical judgment of the Microstation BIM models is achieved, the method for judging whether the two BIM models are identical or not in a multi-level and multi-dimensional mode is achieved through an API of Microstation, the method is simple, effective and high in efficiency, a basis is provided for reuse judgment in lightweight processing of the BIM models, and the method is suitable for popularization and application. And powerful support is provide