The invention discloses a refrigeration implement combined with an air-conditioner and a refrigerator and a controlling method thereof. The refrigeration implement comprises a refrigerator chamber, an air-conditioner chamber, a refrigeration system and a control system, wherein the refrigerator chamber is provided with a refrigerator evaporator which provides cooling capacity, the air-conditioner chamber is provided with an air-conditioner evaporator and a cold-storage device, the air-conditioner chamber is communicated with the outside through a clod air duct, the cold-storage device is used for absorbing the cooling capacity when the air-conditioner evaporator works and releasing the cooling capacity towards the outside when the cold air duct opens, the refrigerator system comprises a common use compressor, a common use condenser, a refrigerator branch circuit and an air-conditioner branch circuit, the refrigerator branch circuit and the air-conditioner branch circuit are arranged in parallel through an electromagnetic valve, the common use compressor, the common use condenser, the refrigerator branch circuit and the air-conditioner branch circuit are connected with one another, the refrigerator branch circuit comprises the refrigerator evaporator, the air-conditioner branch circuit comprises the air-conditioner evaporator, the control system is used for sensing the temperature of the outside and the temperature of the refrigerator chamber, controlling on and off of the refrigeration system according to the temperature of the outside and the temperature of the refrigerator chamber, and controlling at least one of the air-conditioner evaporator and the refrigerator evaporator to work when the refrigeration system starts.