Air volume control method and system of vehicle air conditioner and vehicle

The invention discloses an air volume control method for a vehicle air conditioner. The method comprises the following steps that an air conditioner controller receives a set temperature; the air conditioner controller obtains blower basic voltage; the air conditioner controller corrects the basic voltage of the air blower according to the correction coefficient and outputs first correction voltage to the air blower; the air blower works under the first correction voltage; the air conditioner controller recognizes the operation of increasing or decreasing the air volume by the user, and a new correction coefficient at the current set temperature is obtained in combination with the correction coefficient recorded in the storage; the air conditioner controller corrects the first correction voltage of the air blower according to the new correction coefficient and outputs second correction voltage to the air blower, and meanwhile, the air conditioner controller records the current set temperature and the new corr