Disclosed are a device for evaluating performance of an air conditioner based on climate simulation and a method thereof. The device for evaluating performance of an air conditioner based on climate simulation and the method thereof may supply load to one or more sub-chambers that simulates climate of a selected region, may calculate energy consumption of an air conditioner by applying changes in temperature and humidity supplied by the sub-chambers, and may evaluate energy consumption of the air conditioner that operates in the region with specific climate.