Aiming at the problems that paddy is prone to fever, mildew and so on due to the characteristics of the hot and humid summer climate in Hunan, the air-conditioning control temperature technology was used to carry out the summer experiment of grain storage in the large warehouses. The changes of the paddy’s temperature, moisture, fatty acid value and other quality indicators as well as the energy consumption were analyzed. In order to provide an effective scientific basis for quasi-low temperature grain storage in Hunan Province. The results showed that the best period of using air-conditioning control temperature technology in Hunan was the high temperature period from July to August. The application of this technology can realize the quasi-low temperature storage of large warehouses, reduce the loss of paddy’s moisture, and effectively delay the ascent rate of paddy’s fatty acid value. Restrained the occurrence of insect pests in the grain heap to a certain extent, stabilized the rice in summer, ensured the quality and safety of grain, and has obvious economic benefits.