Abstract: The quantitative evaluation of Crop Climate is an inevitable trend in the development of agrometeorological services. By using fuzzy mathematics theory, the membership function model of temperature, precipitation and sunshine time for broad bean were established, and the membership degree of temperature, precipitation and sunshine in the growth nand development of broad bean was calculated to estimate the climatic suitability to broad bean quantitatively. The meteorological factors during growth and development of broad bean in 2007 and 2008 was calculated, results indicated that the membership degree for the temperature and sunshine was relative high, but for the precipitation was low with large variable extents. These explained that the temperature and sunshine were able to satisfy the growth and development of broad bean. The lack of the natural precipitation was a limited factor for the formation of the broad bean yield.