The 2006-2009 logbook data of Taiwanese Pacific saury fishery coupled with MODIS satellite-derived sea surface temperature (SST) and chlorophyll-a concentration (Chl-a) data were used to determine the saury’s SST and Chl-a preferences, then to predict their monthly potential fishing grounds. The results show that the highest catch per unit effort (CPUE) of Pacific saury is in October. Its corresponding SST and Chl-a preferred ranges based on the histogram analysis show a bimodal phenomenon, 13-14 & 15-16°C and 0.5-0.6 & 1.0-1.1 mg m-3, respectively. In addition, the potential fishing grounds of Pacific saury covered larger areas in September and October, but it became the narrow-horizontal belt areas in November and December, between the Kuroshio and Oyashio transition zone. Moreover, the average latitudes of southernmost boundary line of potential fishing ground are 43.0 in September and 40.2 in December. Their monthly potential fishing grounds show a remarkable southwestward latitudinal movement. In this study, based on the climate change scenarios, using 1, 2, and 4 °C SST rise in relative to the normal years (2006-2008), the spatial and temporal distribution characteristics of monthly potential saury’s fishing grounds were examined. Results showed a statistically significant poleward shift of potential saury habitats during the influence of SST rises. These results can improve understanding the variability of Pacific saury’s spatial distribution, and will form the basis for the fishery management and fishing forecasting in the future.