A civil defense engineering quality supervision system was designed based on BIM technology,and the architecture and software design of the system were studied.The data acquisition and processing layer,BIM model integration layer,and quality supervision and control layer were discussed.By testing and verifying the functionality and performance of the system,we aim to combine BIM technology to achieve comprehensive supervision and control of the quality of civil defense engineering,provide more comprehensive,visual,and efficient supervision methods for civil defense engineering,and further promote the future development of the system to adapt to constantly changing needs and technological development needs.