Suspending fishing activities is one kind of input control management measures. Since 2002 the fisheries authorities have implemented voluntary suspension of fishing activities program which allows fishermen to voluntarily reduce fishing days to a specific number. This program is aimed to reduce the input level of fishing efforts and thus improves fisheries resources in the coastal and offshore waters around Taiwan. The purpose of this study is to explore the fishermen’s motives and constraints to participate the program and their viewpoints toward ocean usage. The impact of these variables to participating intention is analyzed as well. A structured questionnaire was designed to collect the empirical data from fishermen and a total number of 859 valid samples were reclaimed. The study showed that fishermen did not reveal strong motives to participate the program and highly agreed that the main constraint is the low annual rewards. Fishermen also agreed that they have high priority to use ocean. In the analysis of the factors to intention of participating the program, the study found that the fishermen with more liberal attitude toward ocean usage and supportive of the rewards being kind of subsidies to livelihood revealed higher intention to participate the program. At last, the study based on the findings proposed some management suggestions for the concerned authorities.