Station device on which cleaner is docked and operating method of station device

A station device on which a cleaner is docked, the station device comprising:

• a suction motor configured to generate a suction force to suck up dust from a dustbin disposed in the cleaner;
• a zero crossing point (ZCP) circuit configured to detect a ZCP of an alternating current (AC) input voltage applied to the station device;
• and
• at least one processor configured to control supply of the AC input voltage to the suction motor,
• wherein the at least one processor is further configured to
• detect a first ZCP and a second ZCP with respect to the AC input voltage, by using the ZCP circuit,
• obtain information about a pulse width from the first ZCP to the second ZCP,
• identify whether the AC input voltage is in an overvoltage state, based on the information about the pulse width from the first ZCP to the second ZCP, and
• based on the AC input voltage being in the overvoltage state, deactivate an operation of the suction motor.