Abstract: An optimal planning model system(OPMS),based on system approach and optimization, has been developed and used for Daqing Oilfield's Five-Year Plan(86-90).OPMS, generates better Plans than conventional procedures, that results has great econeomic significance. In OPMS, concept design, Parameters generator, optimal model, simulator, reports generator, sensitivity analysis, concept design analysis are designed as one integrated system, but calculation could be stopped after each step. The Production Planned, limitation and balance of output of oil and water content, natural resaurces, manpowes, investment, cost and material etc. are taken into account in the optimal planning model. In Jan., 1987, as a research work, OPMS, were approved by the academy of science and the ministry of petroleum industry in china.