The invention relates to an air conditioning method for energy-saving and consumption-reducing in a spinning plant and a unit air conditioner device thereof. The method is that normal temperature air is indirectly cooled in high temperature season to realize falling temperature air conditioner, and sirocco is discharged into the environment; in low temperature season, the device in the spinning plant gives out heat to realize heating up air conditioner in the plant. The unit air conditioner device comprises air indirect cooling control, warm and humid control room, air supply room, air supplypassage, normal temperature air supply passage, hot air delivery duct, dust cleaning apparatus, and hot air draft passage. The air conditioner of the invention is environmental and protective. By adopting water as a freezing medium, the invention has non-destroy to the atmospheric ozone layer and is a perfect environment-friendly air conditioner mode. In high temperature, the hot air discharged from the workshop is purified, which is in accordance with the present environment protection policy in our country.