Though it bears favorable natural environment, the development of Taiwan coastal fishery is blocked by many factors. Among which, the exhausted fishery resources stays at the top, resulting from the various pollution, over-fishing and illegal fishing etc.. In addition, subject to the WTO regulations, the fiercer competition facing fishing products is another factor. To improve this situation, the Fisheries Administration takes many measures, in order to protect the fishery resources, realize the sustained development and increase the income of fishermen. This research is to, by the method of policy analysis and the principle of the fisheries economics, discuss the protection measures on Taiwan coastal fishery resources in recent years. Taking the policy planning into consideration, other than restoring the cultivation and re-productivity of the fishery resources, the diverse development is also concerned. While the analysis of the fish output, production value, unit fishing effort and the income of the fishermen presents a well performance. This research is designed to discusses, with the method of cost-benefit-analysis, the executive benefits of the measures in 2000, 2001 and 2002, with the results showing the proportion of the profits to the cost over 1 and the net profits also speaking for the well performance. Suggestions: 1. The policies for the coastal fisheries should be pertinence of the concrete targets, in order to avoid the decrease in profits resulting form the conflict regulations. The harmony among regulations is important for realization of the diverse development. 2. More detailed statistics is necessary for objective assessment of the executive performance. 3. The results attained always lag the policy application, so that the timing and the durative of the execution cannot be neglected or all efforts may be in vain. And experts are necessary to supervise and assess if the running cost of the policy enforcement is regarded as the scale economy, and such performance should survive the changes in personnel and the decrease in outlay.