A freezing and refrigerating device, comprising a box body and a door body pivotably connected to the box body, wherein inside the box body are defined: at least one storage compartment for storing articles; an air supply path configured to supply cooling air flow to the at least one storage compartment; an air return path configured to allow the air flow from the at least one storage compartment to pass; a cooling chamber which communicates with the air supply path and the air return path, and contains an evaporator for cooling the air entering the cooling chamber from the air return path, a blower for driving the air inside the cooling chamber to flow towards the air supply path and a defrosting heater provided on the evaporator; and an air discharging path communicating with the cooling chamber and an ambient space so that the air in the cooling chamber is directly discharged to the ambient space, wherein the air supply path and the air return path are respectively provided with an air supply door and an air discharging door for selectively connecting or blocking the air supply path and the air return path, wherein the at least one storage compartment comprises a refrigerating compartment and a freezing compartment that are provided in a vertical direction relative to each other, and the cooling chamber is located behind the freezing compartment and is separated therefrom by a rear cover plate of the freezing compartment, characterized in that the air supply path comprises a refrigerating air feeding passage located behind the refrigerating compartment and a freezing air inlet provided at the rear cover plate of the freezing compartment, and the air supply door comprises a refrigerating air feeding door provided inside the refrigerating air feeding passage and a freezing air feeding door provided at the freezing air inlet. at least one storage compartment for storing articles; an air supply path configured to supply cooling air flow to the at least one storage compartment; an air return path configured to allow the air flow from the at least one storage compartment to pass; a cooling chamber which communicates with the air supply path and the air return path, and contains an evaporator for cooling the air entering the cooling chamber from the air return path, a blower for driving the air inside the cooling chamber to flow towards the air supply path and a defrosting heater provided on the evaporator; and an air discharging path communicating with the cooling chamber and an ambient space so that the air in the cooling chamber is directly discharged to the ambient space, wherein the air supply path and the air return path are respectively provided with an air supply door and an air discharging door for selectively connecting or blocking the air supply path and the air return path, wherein the at least one storage compartment comprises a refrigerating compartment and a freezing compartment that are provided in a vertical direction relative to each other, and the cooling chamber is located behind the freezing compartment and is separated therefrom by a rear cover plate of the freezing compartment, characterized in that the air supply path comprises a refrigerating air feeding passage located behind the refrigerating compartment and a freezing air inlet provided at the rear cover plate of the freezing compartment, and the air supply door comprises a refrigerating air feeding door provided inside the refrigerating air feeding passage and a freezing air feeding door provided at the freezing air inlet.