A laundry treatment device, comprising: a first cabinet configured for laundry treatment therein; a tub provided in the first cabinet; a circulation duct that circulates air inside the tub; a second cabinet, which is under the first cabinet, formed separate from the first cabinet and coupled thereto; and a heated-dry-air supply device provided in the second cabinet, the heated-dry-air supply device supplying heated dry air to the first cabinet; wherein the heated-dry-air supply device comprises a heat pump including: an evaporator provided along the circulation duct; a compressor; a condenser provided along the circulation duct; an expansion valve: whereby the evaporator and the condenser are provided along the circulation duct such that air discharged from the tub passes the evaporator and the condenser of the heated-dry-air supply device along the circulation duct to be re-supplied to the tub; characterized in that the heat pump further comprises: a filler that fills refrigerant into the heat pump and is provided at a refrigerant pipe that connects the evaporator and the compressor; and a discharge device that discharges refrigerant from the heat pump and is provided at a refrigerant pipe that connects the compressor and the condenser. a first cabinet configured for laundry treatment therein; a tub provided in the first cabinet; a circulation duct that circulates air inside the tub; a second cabinet, which is under the first cabinet, formed separate from the first cabinet and coupled thereto; and a heated-dry-air supply device provided in the second cabinet, the heated-dry-air supply device supplying heated dry air to the first cabinet; wherein the heated-dry-air supply device comprises a heat pump including: an evaporator provided along the circulation duct; a compressor; a condenser provided along the circulation duct; an expansion valve: whereby the evaporator and the condenser are provided along the circulation duct such that air discharged from the tub passes the evaporator and the condenser of the heated-dry-air supply device along the circulation duct to be re-supplied to the tub; characterized in that the heat pump further comprises: a filler that fills refrigerant into the heat pump and is provided at a refrigerant pipe that connects the evaporator and the compressor; and a discharge device that discharges refrigerant from the heat pump and is provided at a refrigerant pipe that connects the compressor and the condenser. an evaporator provided along the circulation duct; a compressor; a condenser provided along the circulation duct; an expansion valve: whereby the evaporator and the condenser are provided along the circulation duct such that air discharged from the tub passes the evaporator and the condenser of the heated-dry-air supply device along the circulation duct to be re-supplied to the tub; characterized in that the heat pump further comprises: a filler that fills refrigerant into the heat pump and is provided at a refrigerant pipe that connects the evaporator and the compressor; and a discharge device that discharges refrigerant from the heat pump and is provided at a refrigerant pipe that connects the compressor and the condenser. whereby the evaporator and the condenser are provided along the circulation duct such that air discharged from the tub passes the evaporator and the condenser of the heated-dry-air supply device along the circulation duct to be re-supplied to the tub; characterized in that the heat pump further comprises: a filler that fills refrigerant into the heat pump and is provided at a refrigerant pipe that connects the evaporator and the compressor; and a discharge device that discharges refrigerant from the heat pump and is provided at a refrigerant pipe that connects the compressor and the condenser.