The ways of building information model to realize information data sharing mainly include:using special intermediate file format and using public data model format.In view of the fact that DXF,a special intermediate file format,has lost information when transferring model attribute information,the terrain model is shared across platforms based on IFC,and the integrity of model attribute information is preserved.The results show that IFC,as an open international standard for data exchange and expression of building products,provides an idea for model information data sharing between BIM application systems.The research results have certain reference significance for surveying and mapping units to carry out BIM work.