Refrigerator and refrigeration control method

The invention particularly relates to a refrigerator and a refrigeration control method. The refrigerator comprises a refrigerator body and a refrigerating system arranged in the refrigerator body, a first storage chamber is defined by the refrigerator body, the refrigerating system comprises a compressor, a condenser, a capillary tube and a cold supply loop of an evaporator which are connected through a pipeline, and the evaporator is used for providing cooling capacity for the first storage chamber. The cabinet body further comprises a variable-temperature storage chamber which is arranged below the first storage chamber and provided with an opening facing the side face. The refrigerating system further comprises an auxiliary condenser which is selectively connected between the compressor and the condenser. The cabinet body comprises a variable-temperature inner container used for forming the variable-temperature storage chamber. Wherein the auxiliary condenser is fixed on the variable-temperature inner con