The construction cost business mainly includes the preparation of bill of quantities, the preparation of the tender control price, settlement auditing, and the whole-process cost management. Specifically, bill of quantities is the basic document of the bidder’s unified quotation provided by the tenderer. The tender control price is the maximum construction cost limited by the bidder on the proposed construction project, which is also called block bid price, bid control price or the highest quotation. The settlement auditing refers to the process of the construction enterprises handling the project price settlement with the construction unit (owner) in accordance with the contract and the completed project quantities. Generally, the construction unit entrusts a consulting agency with appropriate qualifications to calculate and review the submitted settlement until all parties perform links such as confirming the amount. The whole-process cost management is the process of investment management for all or part of the construction project from decision-making to completion.