Abstract: It is recognized that global warming is more obvious in high latitude and cool climate regions, and shown definite uncertain features. In order to clarify the adaptation trends of the crops to future climate scenarios, a simulation experiment station of infrared temperature increasing was set up in Harbin of Northeast China, and the free air temperature increasing (FATI) system was applied to simulate the effects of increased temperature on rice grow and yield. Two temperature gradients were installed, i.e., each set with one infrared lamp (W₁), and each set with two infrared lamps (W₂). Under increased temperature, the rice growth and development accelerated, and the beginingspike period was in advance while the harvest period delayed. The tiller number increased while the yield per tiller declined, the plant height increased but the plant appeared lodging at milkripe stage, and the leaf area increased and the single leaf showed an extended length. As compared with the control, the rice yield differed under two warming gradients, i.e., increased under W₁ but slightly decreased under W₂. There existed differences with the control in the aboveground organic matter distribution and the spike grain structure under increased temperature. Under temperature increasing, the rice 1000-grain weight reduced, whereas the grain moisture content, leaf chlorophyll content, and leaf net photosynthetic rate increased.