Abstract: A refrigerated display case with multiple air curtains and a refrigerating system for refrigerating circulation air is disclosed. The refrigerating system includes a compressor, a condenser and two evaporators. One terminal port of both evaporators, positioned on the bottom portion of each evaporator, is alternately and selectively connected with the discharge side of the condenser or the suction port of the compressor through a four-way valve. The other terminal ports of both evaporators, positioned on the upper portion of each evaporator, are connected to each other through communicating lines. The communicating lines are connected to each other by a connecting line. A connecting line also connects a point between the two four-way valves to one of the communicating lines. The two communicating lines and the connecting lines are provided with at least one expansion valve and a plurality of electromagnetic valves and check valves.