The change of greenhouse gases and its contribution to climate change, as well as impact of climate change on geographical distribution of crops in China and in the world are analyzed in the paper. Temperature will increase notably when CO 2 concentration double the present and the trend will be more obvious in northern China. This paper reviewed the influence of climate change on paddy, wheat and maize in different part of China. Adaptive strategy for different types of agricultural production and agro ecosystem in China was given, and diminution strategy such as controlling the discharge of greenhouse gas was also discussed. They include: (1) the strategies and measures of slowing down greenhouse gases discharge, further divided into non industry and industry gases let out. For example, to increase the coverage of vegetation and to control grassland degradation and desertification are non industry methods. And retarding the industry gases let out or traffic vehicles gases discharge belongs to industry method. (2) The adaptive strategies after the greenhouse gases increase include adjusting land use and plant system, improving the agricultural ecological conditions and so on.