Air conditioner control method and system, air conditioner and storage medium

The invention discloses a control method and system of an air conditioner, the air conditioner and a storage medium. The air conditioner comprises an enhanced vapor injection compressor, a first economizer, a second economizer, a first electronic expansion valve and a second electronic expansion valve, a first auxiliary road is arranged in the first economizer and connected with a first auxiliary road inlet and a first auxiliary road outlet, the first auxiliary road inlet is connected with the first electronic expansion valve, and the first auxiliary road outlet is connected with the second electronic expansion valve. The first auxiliary path outlet is connected with an air supply port of the enhanced vapor injection compressor; a second auxiliary path inlet of the second economizer is connected with a second electronic expansion valve; the method comprises the following steps: acquiring the side road superheat degree of a first side road; the main path supercooling degree of the first main path is obtained;