The tactical win is described with the concept of the extension relationship, the method of extension about the tactical win and the extension field of the tactical win are discussed in this paper.

The paraments and evaluation system of earned value theory are proposed and their practical process of implement for cost control management in P3E/C software are analysed.

Earned value analysis is an integrated method for general measurement of project progress and cost status and an efficient project monitor and control index,basically it applies currency quantity or resource consumption quantity instead of engineering quantity to measure project progress.

On the basis of the theory of earned value,authors discuss and research the development of computer aided cost & schedule control system.

Application of earned value concept to the control of construction cost;

Application of Earned Value Concept in the Dynamic Control of Construction Cost;

As schedule and cost is managed synthetically in project,earned value concept played an important role in construction project management.

The authors have first recounted the current situation of the progress, quality and investment control method being used in the reservoir resettlement system in the country, suggested to apply the gain value method to the target.