Abstract: Currently, EPC engineering construction is actively adopting informatization means such as BIM technology to improve engineering quality and intelligent management and control efficiency. Therefore, taking EPC projects as the research object, this paper explored the construction and application of a multi-dimensional business coding system, aiming to improve project quality and management efficiency. Firstly, we analyzed the current application status of existing BIM technology in the intelligent management and control coding system, and pointed out the problems caused by the independence of the coding system at each stage. In view of the comprehensive characteristics of the whole stage of EPC projects, a unified multi-dimensional business coding system was proposed, including Work Breakdown Structure (WBS), Project Breakdown Structure (PBS), Quality Breakdown Structure (QBS), and Bill of Quantities Coding Structure, and the proposed coding system was combined with actual engineering business. Automatic coding was realized through Dynamo software, an association between components and codes was established, and an effective association between the BIM model and various businesses was achieved. The research results showed that this coding system can significantly save management costs, improve the digital level of project management, provide important technical means for the intelligent management and control of EPC projects, and have important significance for promoting the sustainable development of project management.