Cleaning system and maintenance station thereof

A cleaning system includes a robot cleaner having an opening unit and a first dirt container funneled to the opening unit, and a maintenance station to which robot cleaner is docked to discharge dirt stored in the first dirt container The maintenance station includes a first inlet hole configured to intake dirt from the first dirt container through the opening unit, a first outlet hole configured to blow air into the first dirt container, a circulating passage provided between the first inlet hole and the first outlet hole, a second dirt container disposed on the circulation passage to store dirt taken in from the robot cleaner, a draft apparatus having a draft fan and a fan motor to drive the draft fan to circulate air through the circulating passage, and a radiator disposed to receive heat from the fan motor so that the fan motor is cooled.