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The phenomenon of "three excesses" is quite common in the cost management of civil engineering in China. The construction project has a long cycle and high consumption, which is not only limited by scientific and technological conditions, but also restricted by the development of objective technology and its performance. The problems of over-budget, over-budget and over-final accounts often occur, which is usually called "three super" phenomenon.

The essence of civil engineering cost management and investment control is to solve practical problems such as technical and economic operation management in engineering construction activities by using scientific and technological principles and economic and legal means, only in each stage of engineering construction;

Only by adopting scientific valuation methods and practical valuation basis and reasonably determining investment estimation can we grasp the pulse of market economy, reduce or avoid the loss of construction funds and maximize the investment benefit of construction funds.

Civil engineering cost management can make use of the investment of construction projects to make a balanced and reasonable distribution among various projects, units and even subprojects, so that the investment of construction units can get the highest benefit as much as possible. Controlling costs and expenses is conducive to saving a lot of construction funds in China's construction industry and promoting China's modernization process.