By using the daily data derived from the Regional Climate Model-PRECIS on the climate scenario of A2 and B2 and on the base-line climatic period, the characteristics and the impacts of future climatic change on agricultures and eco-environment of Loess Plateau in the next decade were analyzed. The result showed that in the next decade, the solar radiation and accumulated temperature are going to increase, but, the precipitation is going to reduce. The increase of air temperature will maybe more impact both on winter wheat and summer maize, while less impact probably on potato. The yield of major staple crops, however, will be impacted largely by the decrease of precipitation. On the condition of the breeds not to be changed, the increase of solar radiation and accumulated temperature will likely induce increase of crop water requirement 10%-15%, sowing delay 1-3 days of winter wheat, early sowing 1-3 days of summer maize and potato, early harvest 1-2 days and decrease of duration 3-5 days of winter wheat, summer maize and potato, resulting in 50%-100% decline of climate yield both in winter wheat and potato. In the next decade, the coverage of grassland in Loess Plateau will reduce and the artificial forest density will decline. The decrease of precipitation and vegetation change will probably cause decline of sheet erosion degree. However, the probability of head-cut gully erosion will increase because of extreme event of precipitation and land use/cover change. The risk of water and soil loss is increasing in Loess Plateau.