Sea surface temperature(SST)is an important indicator representing fish habitat.According to Scomber japonicus fishery-dependent data of large lighting-purse seine,combining with SST by remote sensing,the suitable range of SST of Scomber japonicas during the fishing seasons are analyzed and the changing tendency of the Scomber japonicas habitat caused by variation of water temperature are also discussed.The results proved that suitable range of SST of Scomber japonicas in the East China Sea and Yellow Sea is 15-30℃.This study based on global climate simulations under several emission scenarios(A1FI,A1B,A1T,A2,B1,and B2)from the AR4 of the IPCC to examine the impact on potential habitats of Scomber japonicas for the next 100 years.So we simulate four kinds of water temperatures rise by gradient:(1)monthly average SST increase of 0.5℃;(2)monthly average SST increase of 1℃;(3)monthly average SST increase of 2℃;(4)monthly average SST increase of 4℃.The results indicated that the habitat of Scomber japonicas had a obvious northwards shifting tendency,and the area of habitat would decreased gradually.It is concluded that the rising SST caused by the global climate change would have a seriously effect on the habitat of Scomber japonicas.These results can make us understand the spatial distribution of Scomber japonicas influenced by SST in fishery management and fishery forecasting,which also provide the guide for the prediction of the Scomber japonicus potential habitat in the East China Sea and Yellow Sea.