The invention relates to an efficient air conditioning method and system. The method includes the following steps that after an air conditioner is started, the air conditioner sends a linkage signal to an air freshening machine and receives a feedback signal fed back by the air freshening machine receiving the linkage signal; the air conditioner obtains the relative position and/or distance between the air conditioner and the air freshening machine through processing according to the received feedback signal; and the air conditioner controls the air supply manner of the air conditioner according to the relative position and/or distance between the air conditioner and the air freshening machine. Compared with the prior art, it is effectively ensured that a good airflow circulating loop can be formed between the air conditioner and the air freshening machine no matter how the relative position between the air conditioner and the air freshening machine changes, the purifying effect can be maximum, a comfortable home environment can be better built, meanwhile, operation of a user is also facilitated, and intelligence and user friendliness of the product are improved.