The characteristics of snow disaster in Anhui Province during January-February of 2008 have been analyzed. The extreme maximum temperature during snow disaster in 2008 was obviously higher than other snow disasters in history. The separate and total models of quantitative evaluation of agricultural loss in Anhui Province have been established, using realtime data of snow condition and disaster situation. The model error has been analyzed and the trial application of the model has also been made. The average relative error of separate model was about 30%, while that of total model was about 20%. The total model was more accurate.