The utility model discloses an inner ring fluid control temperature decrment stores up grain system, including storing up grain granary, circulation pipe way, circulation fan, controller, storehouse temperature sensor, circulation pipe says including the ventiduct, keeps warm and violently manages, the heat preservation standpipe, cross the wall coil, and the granary bottom is located to the ventiduct, and the ventiduct is connected with the vent, and the circulation fan is installed on outer bulkhead, and the air intake connection of vent and circulation fan keeps warm and violently manages and the air intake connection of circulation fan, the air outlet and the heat preservation standpipe of circulation fan are connected, cross that wall coil one end is connected with the heat preservation standpipe, in the other end stretches into the granary, and storehouse temperature sensor is connected with the controller, through the whole circulating fumigation in the circulation pipe way realization storehouse, that system cooling and ventilating adopts is inside air current endless form, can not lose the inside moisture of grain, has the characteristics of high efficiency, energy -conservation, environmental protection, and circulating fumigation can also be realized to the pipeline of circulation in utilizing, and the dual mode combines, can improve the utilization efficiency greatly, less equipment investment.