This paper takes the intelligent engineering as an example and uses the Work Breakdown Structure (WBS) tool to decompose the intelligent engineering into specific subsystems and describe each subsystem. In the field of intelligent engineering construction, it is impossible to ensure that the construction project will not be changed. To reduce scope changes, efforts can be made in three aspects: first, to accurately locate project requirements and find enough work to be done; second, to scientifically define the scope of the project and delete unnecessary work; and third, to effectively control scope changes. Ensure that all work is done to achieve the project goals. This paper starts from the actual project management experience, conducts a comprehensive summary and refinement, proposes key strategies and methods for project scope management, and puts forward the following points of view. Intelligent design should be completed by professional design agencies, and intelligent construction should be completed by professional construction teams. There should be standards for intelligent acceptance to follow. Hope this article will be helpful for project managers.