Beverage supplier with emptying and cooling functions

A beverage supplier includes: an inlet conduit communicating with a beverage container; a pumping and cooling device communicating with the inlet conduit, pumping and cooling a beverage from the beverage container, and outputting a cooled beverage; and an output unit electrically connected to the pumping and cooling device, and controlling output of the cooled beverage. In a first state, the pumping and cooling device pumps and cools the beverage through the inlet conduit and from the beverage container. In a second state, the pumping and cooling device empties the beverage remained in the pumping and cooling device.