A beer maker comprising: - a fermentation tank assembly having a fermentation tank having an opening formed therein and a fermentation tank cover that opens/closes the opening; - a refrigeration cycle apparatus including: a compressor, a condenser, an expansion device, and an evaporator, through which a refrigerant is circulated, wherein the evaporator includes an evaporating tube wound around an outer surface of the fermentation tank, wherein the refrigeration cycle apparatus is configured for controlling a temperature of the fermentation tank as the evaporator is disposed at the fermentation tank; and - a heat insulating wall surrounding the fermentation tank and the evaporator together; characterized in that beer maker further comprising: - a water tank for containing water therein; - a water supply pump for pumping water of the water tank; - a water supply heater for heating the water pumped by the water supply pump; and - a supplier adapted to accommodate materials required to brew beer therein and connected to the water supply heater through a water supply flow path, the supplier being connected to the fermentation tank assembly through a main flow path for guiding the materials to brew beer into the fermentation tank assembly; - a base; and - a water tank supporter disposed at the base, the water tank supporter supporting the water tank to be spaced apart from the base, wherein at least one of the compressor, the water supply heater, and the water supply pump is disposed between the base and the water tank. - a fermentation tank assembly having a fermentation tank having an opening formed therein and a fermentation tank cover that opens/closes the opening; - a refrigeration cycle apparatus including: a compressor, a condenser, an expansion device, and an evaporator, through which a refrigerant is circulated, wherein the evaporator includes an evaporating tube wound around an outer surface of the fermentation tank, wherein the refrigeration cycle apparatus is configured for controlling a temperature of the fermentation tank as the evaporator is disposed at the fermentation tank; and a compressor, a condenser, an expansion device, and an evaporator, through which a refrigerant is circulated, wherein the evaporator includes an evaporating tube wound around an outer surface of the fermentation tank, wherein the refrigeration cycle apparatus is configured for controlling a temperature of the fermentation tank as the evaporator is disposed at the fermentation tank; and - a heat insulating wall surrounding the fermentation tank and the evaporator together; characterized in that beer maker further comprising: - a water tank for containing water therein; - a water supply pump for pumping water of the water tank; - a water supply heater for heating the water pumped by the water supply pump; and - a supplier adapted to accommodate materials required to brew beer therein and connected to the water supply heater through a water supply flow path, the supplier being connected to the fermentation tank assembly through a main flow path for guiding the materials to brew beer into the fermentation tank assembly; - a base; and - a water tank supporter disposed at the base, the water tank supporter supporting the water tank to be spaced apart from the base, - a water tank for containing water therein; - a water supply pump for pumping water of the water tank; - a water supply heater for heating the water pumped by the water supply pump; and - a supplier adapted to accommodate materials required to brew beer therein and connected to the water supply heater through a water supply flow path, the supplier being connected to the fermentation tank assembly through a main flow path for guiding the materials to brew beer into the fermentation tank assembly; - a base; and - a water tank supporter disposed at the base, the water tank supporter supporting the water tank to be spaced apart from the base, wherein at least one of the compressor, the water supply heater, and the water supply pump is disposed between the base and the water tank.