A liquid dispensing device comprising: a dispenser positioned such that at least a portion of the dispenser is exposed above a sink; a liquid processing module installed separately from the dispenser, a nozzle (210, 220) installed on the dispenser, the nozzle (210, 220) being configured to supply a liquid generated in the liquid processing module to the sink; a user interface device being configured to receive a liquid discharge command and/or a liquid discharge stop command from a user; wherein the liquid processing module includes a sterilized liquid module and a hot liquid tank, the sterilized liquid module is configured to generate the sterilizing liquid based on receiving power; the hot liquid tank is configured to generate the hot liquid; a controller configured to manage the sterilized liquid module and/or to manage the hot liquid tank, characterized by the user interface device being installed on the dispenser and the liquid dispensing device further comprising: a hot liquid valve configured to control a flow of liquid into the hot liquid tank or a flow of liquid from the hot liquid tank; a common tube configured to receive liquid from the hot liquid tank; a first liquid discharge valve installed on the common tube, the first liquid discharge valve including a first outlet that is configured to discharge liquid from the common tube toward the nozzle (210, 220) and a second outlet that is configured to drain liquid from the common tube away from the nozzle (210, 220); a temperature sensor installed on the liquid discharge valve; a drain tube connected to the first liquid discharge valve to discharge the liquid drained via the second outlet of the first liquid discharge valve; and wherein the controller is further configured to manage the hot liquid valve and the first liquid discharge valve. a dispenser positioned such that at least a portion of the dispenser is exposed above a sink; a liquid processing module installed separately from the dispenser, a nozzle (210, 220) installed on the dispenser, the nozzle (210, 220) being configured to supply a liquid generated in the liquid processing module to the sink; a user interface device being configured to receive a liquid discharge command and/or a liquid discharge stop command from a user; wherein the liquid processing module includes a sterilized liquid module and a hot liquid tank, the sterilized liquid module is configured to generate the sterilizing liquid based on receiving power; the hot liquid tank is configured to generate the hot liquid; a controller configured to manage the sterilized liquid module and/or to manage the hot liquid tank, characterized by the user interface device being installed on the dispenser and the liquid dispensing device further comprising: a hot liquid valve configured to control a flow of liquid into the hot liquid tank or a flow of liquid from the hot liquid tank; a common tube configured to receive liquid from the hot liquid tank; a first liquid discharge valve installed on the common tube, the first liquid discharge valve including a first outlet that is configured to discharge liquid from the common tube toward the nozzle (210, 220) and a second outlet that is configured to drain liquid from the common tube away from the nozzle (210, 220); a temperature sensor installed on the liquid discharge valve; a drain tube connected to the first liquid discharge valve to discharge the liquid drained via the second outlet of the first liquid discharge valve; and wherein the controller is further configured to manage the hot liquid valve and the first liquid discharge valve. a hot liquid valve configured to control a flow of liquid into the hot liquid tank or a flow of liquid from the hot liquid tank; a common tube configured to receive liquid from the hot liquid tank; a first liquid discharge valve installed on the common tube, the first liquid discharge valve including a first outlet that is configured to discharge liquid from the common tube toward the nozzle (210, 220) and a second outlet that is configured to drain liquid from the common tube away from the nozzle (210, 220); a temperature sensor installed on the liquid discharge valve; a drain tube connected to the first liquid discharge valve to discharge the liquid drained via the second outlet of the first liquid discharge valve; and wherein the controller is further configured to manage the hot liquid valve and the first liquid discharge valve.