This paper is concerned with the characterized method of wind speed distribution for calculation of wind power density of regional group and wind potential in Korea. It is shown that the Rayleigh distribution, K = 2, is not suitable for analyzing wind data in Korea. Simple relationship, K = 0.21 V + 0.84, is derived from Weibull wind distribution by analyzing wind data obtained from 24 meteorological station and is a suitable tool for estimation of wind power density. Application of this result, the domestic ideal and actual wind potential are estimated as $3.16{ imes}10^9$ KWH/year and $7.14{ imes}$10^8 KWH/year respectively for the case of 10 meter height, $1m^2$ swept area and $0.1{ imes}0.1Km^2$ land area. And for the case of 50 meter height, ideal and actual wind potential are increased as $7.56{ imes}10^9$ KWH/year and $2.37{ imes}10^9$ KWH/year respectively.