In order to study the commercial crab resources in the coastal area of Penghu, we keep investigating the composition and CPUE of crabs in sea areas around Suogang, Lintou and Sianglu Islet by using crab pots. Besides, the fishery biology research on Portunus sanguinolentus, include carapace width, carapace length, weight, gender, the number of eggs, GSI, and the minimum maturation body size, is also executed this year.