A double cooled draft beer machine, comprising: a cabinet; a refrigeration circuit inside the cabinet, the refrigeration circuit including a compressor, a condenser, and an evaporator; a cold storage chamber inside the cabinet, the cold storage chamber being suitable for holding a cask, and the evaporator being capable of refrigerating the cold storage chamber; a beer pipe and a refrigeration tube capable of refrigerating the beer pipe are arranged inside the cabinet; a beer tap fixed to an outside of the cabinet;and an outer end of the beer pipe connected to the beer tap; an inner end of the beer pipe connectable to the cask; characterized in that at least one solenoid valve, including a first solenoid valve, is set up in the refrigeration circuit, the refrigeration tube is connected to the refrigeration circuit and is connected in parallel with the evaporator; the first solenoid valve capable of opening or closing the refrigeration circuit for refrigerant to flow toward the refrigeration tube or the evaporator; a relay used to control an action of the first solenoid valve; contacts of the relay are connected to the compressor and to a solenoid of the first solenoid valve; a first thermostat used to detect a temperature; and the first thermostat is connected in series with the relay; a detection point of the first thermostat, the detection point located between the refrigeration tube and the beer pipe; wherein when the temperature detected by the first thermostat is higher than a first upper limit temperature threshold set by the first thermostat, the relay controls the first solenoid valve to allow the refrigerant in the refrigeration circuit to stop flowing toward the evaporator, and instead to allow the refrigerant in the refrigeration circuit to flow toward the refrigeration tube only; and wherein when the temperature detected by the first thermostat is equal to or lower than a first lower limit temperature threshold set by the first thermostat, the relay controls the first solenoid valve to allow the refrigerant in the refrigeration circuit to stop flowing toward the refrigeration tube. a cabinet; a refrigeration circuit inside the cabinet, the refrigeration circuit including a compressor, a condenser, and an evaporator; a cold storage chamber inside the cabinet, the cold storage chamber being suitable for holding a cask, and the evaporator being capable of refrigerating the cold storage chamber; a beer pipe and a refrigeration tube capable of refrigerating the beer pipe are arranged inside the cabinet; a beer tap fixed to an outside of the cabinet;and an outer end of the beer pipe connected to the beer tap; an inner end of the beer pipe connectable to the cask; characterized in that at least one solenoid valve, including a first solenoid valve, is set up in the refrigeration circuit, the refrigeration tube is connected to the refrigeration circuit and is connected in parallel with the evaporator; the first solenoid valve capable of opening or closing the refrigeration circuit for refrigerant to flow toward the refrigeration tube or the evaporator; a relay used to control an action of the first solenoid valve; contacts of the relay are connected to the compressor and to a solenoid of the first solenoid valve; a first thermostat used to detect a temperature; and the first thermostat is connected in series with the relay; a detection point of the first thermostat, the detection point located between the refrigeration tube and the beer pipe; wherein when the temperature detected by the first thermostat is higher than a first upper limit temperature threshold set by the first thermostat, the relay controls the first solenoid valve to allow the refrigerant in the refrigeration circuit to stop flowing toward the evaporator, and instead to allow the refrigerant in the refrigeration circuit to flow toward the refrigeration tube only; and wherein when the temperature detected by the first thermostat is equal to or lower than a first lower limit temperature threshold set by the first thermostat, the relay controls the first solenoid valve to allow the refrigerant in the refrigeration circuit to stop flowing toward the refrigeration tube.