Using the data of T213 and local meteorological observation during 2003-2006,the daily extreme temperature forecast models of 109 counties in each season are built in shanxi province. Through simulating the climate background by M-γ climate model under different sky condition in each season, the distribution of the difference between daily extreme temperature of towns and it's neighboring countries is calculated by which the town's daily extreme temperature can be corrected subtly. This method could fill th...