2.1 the principle of full control of so-called full control of all personnel, including the control and the control of the whole construction process, all to control the cost of control is to take the concept of project cost to be instilled into all staff, so that everyone has to establish awareness of cost control to implement cost control everyone's responsibility. the whole construction process of the construction project cost control is the implementation of the project throughout the construction period, so that the construction cost of the whole process with a sense of control.