In this research, using the statistic catch data of northwest pacific saury from the Overseas Fisheries Development Council of The Republic of China between 2004 to 2007 to conduct an resource assessment on pacific saury. First of all, calculate and compare the equilibrium level of open access fishery and the net present value maximization fishery. And then, using the northwest pacific saury statistic catch data from the Food and Agriculture Organization of The United Nations between 2005 to 2007 for the simulation analysis of resource of pacific saury, and the results simulated with the two fishing grounds of the equilibrium value for comparison. The results showed that the problem of depletion of the resource does not exist. The final, assumption that the value of parameters are changing in the range of reasonable in order to understand the impact of the changing in the fishery resource of the stock and effort. Collate and analyze the results, and expect that the results can be a management reference for the management of the northwest pacific saury fisheries.