After the construction drawings of the project are determined, the construction unit must select the construction unit and the suppliers of materials and equipment through a certain way to start the specific implementation of the project. First of all, a very important task is the project budget and the project budget. It is an important basis for signing the contract and also an important basis for settlement after the completion of the project. Its accuracy plays a very important role in the future project cost control work. At present, some regions and departments have begun to entrust this work to the project cost. Consulting agencies have gradually realized the benefits of doing so: (1) The budget document prepared by the engineering cost consulting agency is highly accurate, (2) the responsible body is clear, if there is a major error, there can be a clear responsible body, compare As far as the budget staff is concerned, the legal person responsible can bear the responsibility. Second, in the specific implementation of the project, such as entrusting a cost consulting agency to track and manage the construction investment during the construction process of the project, according to the construction contract and construction drawings , Construction drawing budget is for the construction unit to check the cost. First of all, during the contract signing process, the project content and costs that are likely to increase the cost should be considered in the unit price and contract terms as much as possible. According to the construction drawings and construction drawing budget, combine The cost engineer’s experience in cost management, optimizes the layout of the site construction general drawing, equipment and material transportation routes, and special project construction plans, greatly reduces auxiliary projects, and judges its rationality from a professional perspective, according to the contract and the principle of seeking truth from facts, and it is unreasonable Resolutely refuse to approve, and if it is reasonable, it should be controlled at a reasonable low price to control the unforeseen expenses within a reasonable range.