An air conditioner includes a housing. The housing includes a panel including an opening. The air conditioner further includes an indicator light arranged at the opening, an air heat exchange duct and an air treatment duct arranged in the housing and not in communication with each other, an air heat exchange device arranged at the air heat exchange duct and configured to conduct heat exchange for air in the air heat exchange duct, and an air treatment device arranged at the air treatment duct and configured to conduct at least one of humidification or purification for air in the air treatment duct.