Two rice growing seasons with contrasting climate conditions was employed to study the effects of high temperature (2.6℃ above normal average) and low precipitation (36% lower than normal average) on CH_4 and N_2O emission and yield of six rice varieties (Huayou 14, Xiushui 134, Qiuyoujinfeng, Hanyou 8, Hanyou 113, and Zaoyuxiangjing). The results showed that total CH_4 emissions of all varieties in the rice growing season with high temperature and low precipitation were 1.8~9.6times (4times in average) of that values in the normal season. High temperature and low precipitation condition caused yield loss by 2.4%~22.1% (12.5% in average) of four varieties (Huayou 14, Qiuyoujinfeng, Hanyou 8, and Hanyou 113), and the average reduction rate of 8.6% for Water-saving and Drought-resistance Rice (Hanyou 8 and Hanyou 113) was much lower than that of 16.0% for non-WDR rice (Huayou 14 and Qiuyoujinfeng). The N_2O emission from rice paddies was characterized by pulse and short-interval, and dependent mainly on fertilization and water management rather than climate condition or rice variety. CH_4 emission was the major contributor in greenhouse gases emission in rice paddies under both climate conditions. The results indicated that CH_4 emission reduction should be paid attention to mitigate greenhouse gases emission from rice paddies in global climate change scenario in the future.