This study will focus on the investigation for the environmental factors and zooplankton assemblages in the waters around Taiwan Bank. Shipboard measurements (R/V Hai-An) of temperature and salinity profiles will be obtained with a conductivity–temperature–depth profiler, and zooplankton will be collected by plankton net at each fixed station. To understand the seasonal variation of zooplankton, the density and biodiversity index of zooplankton will be calculated. The biological sample data can also explore the species composition and zooplankton community in the waters around Taiwan Bank. We will conduct a long-term investigation for zooplankton in this area and try to offer some useful suggestion for local fisheries management unit.