The utility model discloses a refrigerating system for a data room. The refrigerating system comprises a cabinet and an air-conditioning unit. At least part of the air-conditioning unit is arranged in the cabinet, the cabinet comprises at least one device area, the air-conditioning unit is arranged on one side of the device area, and a partition board is detachably arranged between the device area and the air-conditioning unit. The air-conditioning unit arranged in the cabinet directly refrigerates a device. Compared with a traditional refrigeration system, refrigeration efficiency is improved. According to the refrigerating system for the data room, compared with the traditional refrigeration system with the air-conditioning unit arranged between cabinets, operability is improved. The refrigerating system for the data room is convenient to assemble and disassemble, and therefore construction cost and material cost are reduced.