To uniformly spray a deodorizing liquid/sterilizing liquid as a dry fog in a wide house such as a wide cattle shed and a warehouse by a few nozzles by providing a driving device for rotating the nozzles for connecting a liquid intake tube and an air intake tube, and widely spraying the deodorizing liquid/sterilizing liquid.

In a wide area spraying system of a deodorizing liquid/sterilizing liquid, a liquid/air sending-out device 5 is composed of a liquid tank 30, a liquid sensing pump 31, a compressor 32 and a liquid/air control circuit 33 for controlling/driving these to send out the deodorizing liquid/sterilizing liquid and compressed air to a liquid sending pipe 3 and a compressed air pipe 4. Nozzles for supplying the deodorizing liquid/sterilizing liquid and the compressed air via a liquid intake tube 7 and an air intake tube 8 using a flexible tube such as soft nylon spray the deodorizing liquid/sterilizing liquid as a fine mist- like dry fog by blowoff force of the compressed air. The nozzles rotate in the horizontal direction by a driving device 9 having a rotary mechanism 11 and a geared motor with a speed reduction mechanism.