The Leslie¡¦s method was employed for the estimation of stock size and catchability coefficient of Sakura shrimp on the southwestern coast of Taiwan from Nov 2002 to May 2004. After analyzing the stock size and catchability coefficient and then applying those estimated value for the optimal conduction of open-access and bioeconomic optimum, the evaluation of the variation under both conductions were available and simulations run by the catch data also can be obtained and useful in comparing with the real situation. By assuming all bioeconomic parameters varied within a reasonable range, we did the comparative static analysis and expected to shed the light on the impact those parameters brought to the stock size.