A control method of a clothes treatment apparatus including a cabinet, a steam unit that is located in the cycle chamber and that is configured to supply steam to the treatment chamber, a water supply tank, a water supply pump, and a lower rack. The control method includes sensing a water level in the water supply tank. The control method further includes, based on sensing the water level in the water supply tank, determining that the water level in the water supply tank is below a first particular water level. The control method further includes, in response to determining that the water level in the water supply tank is below the first particular water level, moving residual water stored in the receiving space to the steam unit by operating the water supply pump.