The invention provides an air-conditioning control method and an air-conditioner. The control method includes the following steps: the temperature and relative humidity of air in the running areas ofthe air-conditioner are obtained; a current comfort index proportional to the relative humidity and temperature is calculated according to the relative humidity and temperature in the running areas ofthe air-conditioner if the comfort index and the relative humidity are greater than a set value; and the air-conditioner is automatically started to run in a comfort dehumidification mode if the relative humidity is greater than the set value and the comfort index is less than the set value, and comprehensive adjustment is performed on the relative humidity and temperature of the current runningarea to make the temperature and relative humidity balanced. Through the automatic starting of a dehumidification function when indoor relative humidity is detected to exceed a certain value, and thedetermination of the dehumidification mode according to the comfort index, users can feel comfortable in the running areas.