The invention discloses an air conditioner temperature control method and device and an air conditioner. The method comprises the steps that the air conditioner running mode, the indoor unit air gear, the air deflector angle, the indoor unit environment detecting temperature and the set temperature are obtained; according to the preset corresponding relation of the preset air conditioner mode, the preset air gear, the preset angle and the preset compensation temperature, and the preset compensation temperature corresponding to the running mode, the indoor unit air gear and the air deflector angle is determined; compensation is conducted on the indoor unit environment detecting temperature according to the determined preset compensation temperature, and accordingly the actual indoor unit environment temperature of the air conditioner is obtained; and according to the difference value between the set temperature and the actual indoor unit environment temperature, the frequency of a compressor of the air conditioner is adjusted in an adaptive manner till the difference value meets the preset range. According to the scheme, the defects that in the prior art, accuracy is poor, reliability is low, and the user experience is poor can be overcome, and the beneficial effects that the accuracy is good, the reliability is high, and the user experience is good are achieved.