Based on the conditions of a 225 000 DWT cruise, we carry out tests on the impact energy of a moored ship under the action of the single wind and single wave, and under that of the combined wind and wave, study the influence on the impact energy under the action of the single wind and single wave and under that of the combined wind and wave by two different wind simulation methods, i.e. blower fan method and method of hanging weight. Test results show that the impact energy by the blower fan method is 17.4﹪ larger than that by method of hanging weight under the combined action of wind and wave. In addition, the wind load has a great impact on the impact energy under that of the combined wind and wave, the impact energy will increase rapidly as the wave height increases.