The invention provides a control method of an
air conditioning system, the
air conditioning system and a computer storage medium. The control method of the
air conditioning system comprises the following steps that based on the air conditioning system, a heating mode is operated, and system operation parameters in a preset oil
return period, accumulated
operation time corresponding to the system operation parameters and outdoor environment temperature are obtained; and based on the end of the preset oil
return period, and under the condition that the system operation parameters, the accumulated
operation time and the outdoor environment temperature all meet the
heating oil return condition, the air conditioning system is controlled to return oil in the heating mode. According to the control method of the air conditioning system, the operation parameters in the oil
return period of the air conditioning system, the accumulated
operation time under the operation parameters and the outdoorenvironment temperature are obtained, and when the parameters meet the
heating oil return condition, the air conditioning system is controlled to carry out
heating oil return, so that the problem that the indoor temperature is reduced due to the fact that an air conditioning system compressor must be switched into a
refrigeration mode during oil return in the prior art is solved, and the user experience is improved.