A refrigerator comprising: a cabinet to define a storage space; a door configured to open and close the storage space; a dispenser provided in the door to dispense hot water; a hot water tank through which water flows to heat water introduced into the door ; a heating unit provided in the door , to heat the hot water tank ; a water inflow passage through which water is supplied to the hot water tank ; a water discharge passage configured to guide hot water discharged from the hot water tank to the dispenser ; a flow rate sensor provided in the water inflow passage to measure a flow rate of water flowing through the water inflow passage ; a water inflow valve provided in the water inflow passage to adjust a flow of water in the water inflow passage ; a water discharge valve provided in the water outlet passage ; an input unit provided in the door to input a temperature of the hot water to be dispensed and a hot water dispensing command; and a controller configured to control the water inflow valve and the water discharge valve , wherein the controller is configured to turn off the water inflow valve and the water discharge valve in a hot water dispensing standby state and configured to turn on the water inflow valve and the water discharge valve in a hot water dispensing process, wherein at least a portion of the hot water tank is made of a magnetic material, and the heating unit is provided as a coil part, which is manufactured by winding a coil, and disposed to face the hot water tank at the outside of the hot water tank so as to heat water flowing in the hot water tank , wherein the refrigerator further comprises a pressure reducing valve provided in the door to reduce a pressure of the water flowing through the water inflow passage . a cabinet to define a storage space; a door configured to open and close the storage space; a dispenser provided in the door to dispense hot water; a hot water tank through which water flows to heat water introduced into the door ; a heating unit provided in the door , to heat the hot water tank ; a water inflow passage through which water is supplied to the hot water tank ; a water discharge passage configured to guide hot water discharged from the hot water tank to the dispenser ; a flow rate sensor provided in the water inflow passage to measure a flow rate of water flowing through the water inflow passage ; a water inflow valve provided in the water inflow passage to adjust a flow of water in the water inflow passage ; a water discharge valve provided in the water outlet passage ; an input unit provided in the door to input a temperature of the hot water to be dispensed and a hot water dispensing command; and a controller configured to control the water inflow valve and the water discharge valve , wherein the controller is configured to turn off the water inflow valve and the water discharge valve in a hot water dispensing standby state and configured to turn on the water inflow valve and the water discharge valve in a hot water dispensing process, wherein at least a portion of the hot water tank is made of a magnetic material, and the heating unit is provided as a coil part, which is manufactured by winding a coil, and disposed to face the hot water tank at the outside of the hot water tank so as to heat water flowing in the hot water tank , wherein the refrigerator further comprises a pressure reducing valve provided in the door to reduce a pressure of the water flowing through the water inflow passage . <EOS>