In this research, using the statistic catch data of northwest pacific Ommastrephes bartrami from the Overseas Fisheries Development council of The Republic of China between 1997 to 2007 and FAO between 1982 to 2007 to conduct and resource assessment on Ommastrephes bartrami. First of all, calculate and compare the equilibrium levels of open access fishery and present value maximization fishery, then evaluate the stock size of Ommastrephes bartrami and compare the equilibrium levels of two models with the statistic readings, the result shows the Ommastrephes bartrami has no sign of depletion. By using sensitivity analysis, we understand the changes on the effort and stock effected by varying different parameters. Finally, by simulating the stock size of open access fishery and present value maximization fishery, we find that unrestricted developing can end up the resources, but Ommastrephes bartrami will receive sustainable development, if it can be effectively managed. And expect that the results can be a management reference for the management of Ommastrephes bartrami fisheries.