Abstract: In this paper, the method for evaluating the wind energy is discussed and the formula for calculating the wind power density in China by using the meteorological data is given, and also the climatic characteristics of the wind energy and the number of hours for wind energy utilization in China is analyzed. On the basis of this calculation, by using the method given by C. G. Justus for estimating the power output from wind-power generator, we have calculated the coefficients of the output capacity of the wind-power generator for three different types of wind-power generator in use in use country shown in diagrams