The present invention relates to the field of air conditioner control techniques Provided are a control method and device for self-cleaning of an air conditioner The method comprises: acquiring a current temperature value and a current humidity value of a space in which an air conditioner is located  determining a current temperature difference value between the current temperature value and a set temperature value and a current humidity difference value between the current humidity value and a set humidity value  and determining  according to the current temperature difference value  a target operating frequency of a compressor  and determining  according to the current temperature difference value and the current humidity value  whether to activate an electrical heater and an output power upon activation of the electrical heater