In this paper,the third-generation wave model WAVEWATCH-III(WW3) was used to simulate the wave field of the East China Sea and South China Sea from January 1988 to December 2009,with wind input of CCMP wind field.Then,the wind energy density and wave energy density were calculated by using the simulated 22-years’ wave-field data and CCMP data.By synthetically considering the size of energy density,the frequency of energy level and the stability of energy density,the re-sources of wind energy and wave energy in the East China Sea and South China Sea were analyzed and regionalized.The re-sult can be a guide to searching location of wind & wave power plant. In this paper, the third-generation wave model WAVEWATCH-III (WW3) was used to simulate the wave field of the East China Sea and South China Sea from January 1988 to December 2009, with wind input of CCMP wind field. Chen, the wind energy density and wave energy density were calculated by using the simulated 22-years’ wave-field data and CCMP data. By synthetically considering the size of energy density, the frequency of energy level and the stability of energy density, the re-sources of wind energy and wave energy in the East China Sea and South China Sea were analyzed and regionalized. the re-sult can be a guide to searching location of wind & wave power plant.