This paper analyses the problem of improving the performance of the mass transfer withthe standpoint of field synergy theory. It mainly studies with the view that adjusting an angle between velocity field and density field could enhance the performance of dehumidifying air-conditioner. At the same time, it cites one kind of the structure of screw type beehive wad dehumidifying airconditioner and screw baffler dehumidifying air-conditioner which is fixed with an angle, validates its performance of intensifying mass transfer and discusses the extensive applications in engineering.