It deeply studies the theory of earned value and concrete practice about integrated control of project cost and progress, it also proposes that we should research quality earned value to speed up the construction of earned value management systems. 深入研究了挣值管理的基本理论和对项目成本与进度集成控制的具体应用,最后提出应研究质量挣值以加快建立实用的挣值管理系统。