Abstract: In this article the variety of climate in Three-Gorges Reservoir from 1961 tO 2000 is analyzed．The results show that a 20-years main cycle in temperature and sunlight is found out and the variety of non-cycle temperature in the Eastern reservoir has increa sed 2．0℃ ，more higher than other sections，and the variety of the precipitation in the ea st has decrea sed 181．5mm ，more obvious than the west and the center．The agro-climate environm ent variety in the next 10 years is forecasted by GM (1，1)Gray System Model，the results show that most of the reservoir’S climate elements will increase，some will lessen．Finally，some advices are put forward.