It is also one of the important basic principles of cost control to save the consumption of manpower, material and financial resources with the core of improving economic benefits. Three aspects of work should be done well: strictly implement the cost range, expense standard and relevant financial system, limit and supervise the expenditure of various costs and expenses; improve the scientific management level of construction projects, optimize the construction scheme and improve the production efficiency; take technical organization measures to prevent the cost out of control and eliminate possible waste, so as to truly realize the benefits from the aspects of management and technical efficiency, Ensure the realization of cost target.