Abstract: In the planning system for the execution of EPC projects, the schedule plan is one of the top priorities of project management, and a reasonable and scientific schedule plan is the premise to ensure that the objectives of the EPC project can be achieved. The schedule plan compiled by combining the manhour schedule and cost weight can more graphically, scientifically and accurately reflect the actual executed progress and cost control of the project simultaneously. This paper analyzes the schedule preparation method, gives how to combine the project contract, execution plan and manhour weight for schedule preparation, and discusses the advantages of this monitoring system。