An air conditioner control method, for controlling a central air conditioner comprising an indoor unit and an air conditioner control device to perform the air conditioner control method, wherein the air conditioner control method comprises the following steps of: acquiring a predicted load of the central air conditioner at the current moment, when a startup instruction or a shutdown instruction corresponding to the indoor unit in the central air conditioner is detected; determining whether the predicted load meets a change condition for an outdoor unit; adjusting an operating status of the outdoor unit in the central air conditioner on a basis of the predicted load, if the predicted load meets the change condition for the outdoor unit; wherein the step of adjusting an operating status of the outdoor unit in the central air conditioner on a basis of the predicted load comprises: determining an efficient outdoor unit combination on a basis of the predicted load; adjusting the operating status of the outdoor unit in the central air conditioner on the basis of the efficient outdoor unit combination; wherein the step of determining whether the predicted load meets a change condition for an outdoor unit comprises: acquiring a total load corresponding to outdoor units that are in a startup status in central air conditioner and a preset gross load corresponding to all outdoor units in the central air conditioner; calculating a load difference between the predicted load and the total load, and calculating a ratio of the load difference to the preset gross load; and determining whether the ratio is greater than a preset value, wherein it is determined that the predicted load meets the change condition for the outdoor unit when the ratio is greater than the preset value. acquiring a predicted load of the central air conditioner at the current moment, when a startup instruction or a shutdown instruction corresponding to the indoor unit in the central air conditioner is detected; determining whether the predicted load meets a change condition for an outdoor unit; adjusting an operating status of the outdoor unit in the central air conditioner on a basis of the predicted load, if the predicted load meets the change condition for the outdoor unit; wherein the step of adjusting an operating status of the outdoor unit in the central air conditioner on a basis of the predicted load comprises: determining an efficient outdoor unit combination on a basis of the predicted load; adjusting the operating status of the outdoor unit in the central air conditioner on the basis of the efficient outdoor unit combination; wherein the step of determining whether the predicted load meets a change condition for an outdoor unit comprises: acquiring a total load corresponding to outdoor units that are in a startup status in central air conditioner and a preset gross load corresponding to all outdoor units in the central air conditioner; calculating a load difference between the predicted load and the total load, and calculating a ratio of the load difference to the preset gross load; and determining whether the ratio is greater than a preset value, wherein it is determined that the predicted load meets the change condition for the outdoor unit when the ratio is greater than the preset value. determining an efficient outdoor unit combination on a basis of the predicted load; adjusting the operating status of the outdoor unit in the central air conditioner on the basis of the efficient outdoor unit combination; wherein the step of determining whether the predicted load meets a change condition for an outdoor unit comprises: acquiring a total load corresponding to outdoor units that are in a startup status in central air conditioner and a preset gross load corresponding to all outdoor units in the central air conditioner; calculating a load difference between the predicted load and the total load, and calculating a ratio of the load difference to the preset gross load; and determining whether the ratio is greater than a preset value, wherein it is determined that the predicted load meets the change condition for the outdoor unit when the ratio is greater than the preset value. acquiring a total load corresponding to outdoor units that are in a startup status in central air conditioner and a preset gross load corresponding to all outdoor units in the central air conditioner; calculating a load difference between the predicted load and the total load, and calculating a ratio of the load difference to the preset gross load; and determining whether the ratio is greater than a preset value, wherein it is determined that the predicted load meets the change condition for the outdoor unit when the ratio is greater than the preset value.