In order to establish a scientific evaluation model of BIM technology application maturity,this paper constructs an in-dex system for the evaluation of BIM technology application maturity of the owner through the key points of project management at the three levels of objective,organization and process,and evaluates the BIM technology application maturity of the owner ac-cording to the entropy weight-TOPSIS model.The results show that by comparing the relative proximity level of the three project management companies as a whole,it is found that there is a certain gap in the BIM application maturity level between different cities,but on the whole,they have reached the development level.The rationality of the model is verified by case analysis,which provides some theoretical support and practical guidance for the BIM application capability maturity assessment of the owner.