Abstract: In BIM applications， different BIM software tools are typically used to establish models based on project characteristics. These models are then exported in either proprietary software formats or universal data formats for transfer and use in other software platforms. However， issues such as data loss and distortion may occur during the conversion process. Therefore， this paper studies and proposes a technical approach that utilizes the universal BIM data format， IFC， as the foundational data source for modeling. First， based on the modeling requirements for building engineering， an IFC component library was developed to provide component resources for the BIM modeling process. Second， key technologies in BIM modeling were studied， including spatial location assignment， geometric dimension modification， and color and material setting， and their logical mapping relationships to the IFC schema were also analyzed. Finally， an IFC schema-based BIM modeling platform was developed and tested on a building project. The results demonstrate the feasibility of this IFC-based modeling approach. As IFC component resources develop， this approach will facilitate IFC-based modeling and improve the quality and efficiency of BIM data sharing and exchange.