An air conditioner control device and an air conditioner control method. The air conditioner control device includes: a receiver that receives measurement values for ambient temperatures of air conditioners installed inside a facility; and a controller that adjusts setting temperatures for cooling operations (or heating operations) of each of the air conditioners to values that are less (or valuesthat are greater) than the measurement values for each of the air conditioners, when at least one of the measurement values received by the receiver is greater (or less) than a target temperature inside the facility.