Abstract: Using data of average daily power load and corresponding meteorological data for 2010-2013 in Changsha City, the inf l uence of social and economic factors on power load has been eliminated by statistical methods. Then, the relationship model between electric power load and meteorological factors has been established, and the meteorological service benefit to electric dispatching in Changsha has been assessed by using comparative analysis method, The results show that the meteorological service benefit to electric dispatching is 277 million yuan for 2010-2013 in Changsha.