A beverage maker comprising: a water supply module configured to supply water; an ingredient supplier connected to the water supply module through a first main channel ; a fermentation module connected to the ingredient supplier through a second main channel and configured for mixing ingredients from the ingredient supplier with water; a beverage dispenser connected to the second main channel ; and a sub channel connecting the water supply module to the beverage dispenser ; wherein the beverage dispenser comprises: a dispenser configured to dispense the beverage; and a beverage dispensing channel which connects the dispenser to the second main channel , the sub channel being connected to the beverage dispensing channel ; wherein a beverage dispensing valve configured to open and close the beverage dispensing channel is installed in the beverage dispensing channel , and the sub channel is connected to the beverage dispensing channel between the beverage dispensing valve and the second main channel or between the beverage dispensing valve and the dispenser ; the beverage maker further comprising: a drain channel connected to the beverage dispensing channel at a portion between the dispenser and the beverage dispensing valve among to communicate with the outside; and a drain valve installed in the drain channel and configured to open and close the drain channel . a water supply module configured to supply water; an ingredient supplier connected to the water supply module through a first main channel ; a fermentation module connected to the ingredient supplier through a second main channel and configured for mixing ingredients from the ingredient supplier with water; a beverage dispenser connected to the second main channel ; and a sub channel connecting the water supply module to the beverage dispenser ; wherein the beverage dispenser comprises: a dispenser configured to dispense the beverage; and a beverage dispensing channel which connects the dispenser to the second main channel , the sub channel being connected to the beverage dispensing channel ; wherein a beverage dispensing valve configured to open and close the beverage dispensing channel is installed in the beverage dispensing channel , and the sub channel is connected to the beverage dispensing channel between the beverage dispensing valve and the second main channel or between the beverage dispensing valve and the dispenser ; the beverage maker further comprising: a drain channel connected to the beverage dispensing channel at a portion between the dispenser and the beverage dispensing valve among to communicate with the outside; and a drain valve installed in the drain channel and configured to open and close the drain channel . a dispenser configured to dispense the beverage; and a beverage dispensing channel which connects the dispenser to the second main channel , the sub channel being connected to the beverage dispensing channel ; wherein a beverage dispensing valve configured to open and close the beverage dispensing channel is installed in the beverage dispensing channel , and the sub channel is connected to the beverage dispensing channel between the beverage dispensing valve and the second main channel or between the beverage dispensing valve and the dispenser ; the beverage maker further comprising: a drain channel connected to the beverage dispensing channel at a portion between the dispenser and the beverage dispensing valve among to communicate with the outside; and a drain valve installed in the drain channel and configured to open and close the drain channel . a drain channel connected to the beverage dispensing channel at a portion between the dispenser and the beverage dispensing valve among to communicate with the outside; and a drain valve installed in the drain channel and configured to open and close the drain channel . <EOS>