Application in the cost of project is managed of analytic approach of earning valueSummary: The main key element of cost management control of the project is quality, the progress and cost. This text has introduced an effective project cost office procedure --Analytic approach of earning value. Person who earn analytic approach project cost a measurement working commonsense method of performance of management. The concept of the introduction earning value of this text, the analytic approach principle of earning value and application in the cost of project is managed of analytic approach of earning : The cost of project is managed, cost, progress, the analytic approach of earning value In the cost management of the project, it is a main goal of management that the cost, progress are controlled, people often just managed them separately in the past, lacked the close connection each other, this has brought a lot of questions. Costs the cost with planning the budget cost totally about equally totally such as when the project goes on to certain stage, but the project amount of material object (progress) that has already been finished actually has not reached the amount of plan estimated. Reach project budget go beyond and have surplus project amount want finish, already, want, finish project must increase more cost, carry on cost control, make project finish to project right away too late in budget cost at this moment. This proves the actual cost can only relatively explain a side with adding up to the budget cost totally, the cost which reflect the project that can not be true controls the state.