A compensational control method includes the steps of: controlling a plurality of indoor air conditioning apparatuses to be in operation according to a target temperature; receiving continuously an operating parameter and an environmental datum from each of the indoor air conditioning apparatus; determining whether there is a specific indoor air conditioning apparatus that needs support; acquiring an adjacent indoor air conditioning apparatus which is influential for the specific indoor air conditioning apparatus according to an influence form which is previously built; establishing a supportive strategy according to a supportable operation capability of the adjacent indoor air conditioning apparatus; and adjusting the operating parameter of the adjacent indoor air conditioning apparatus according to the supportive strategy. Therefore, the adjacent indoor air conditioning apparatus is provided to improve an ambient temperature of an area where the specific indoor air conditioning apparatus is installed.