Therefore, the whole process from the beginning of bidding to the completion and acceptance must be cost-controlling. Do a good job in cost forecasting and contracting in the bidding stage, make cost plans and cost targets in the construction process after winning the bid, adopt effective means of combining technology and economy to control costs, and handle settlement and additional contract prices at the completion and acceptance stage of the project. Do a good job in cost accounting and analysis, so that construction can be effectively controlled from start to finish.