Drying and mould-proof control method and device for air conditioner

The invention discloses a drying and mould-proof control method and device for an air conditioner. The air conditioner comprises a compressor and an indoor fan. The drying and mould-proof control method comprises the following steps that when the air conditioner receives a turn-off instruction, the current operation mode of the air conditioner is judged; if it is judged that the current operation mode of the air conditioner is a refrigeration mode or a dehumidification mode, the indoor light intensity is detected; and the compressor is controlled to be turned off, and the rotating speed and time of the indoor fan which continues to operate are controlled according to the indoor light intensity. Accordingly, the indoor fan is controlled to continue to operate after the turn-off instruction is received so as to blow dry condensate water formed on an indoor heat exchanger, and mould is prevented from being bred on the surface of the indoor heat exchanger; moreover, the rotating speed and the operation time of the indoor fan are controlled according to the indoor light intensity, the user-friendly purpose is achieved, and user experience is improved.