A refrigerating storage cabinet, comprising: a compressor that is driven by an inverter motor; a condenser that causes heat to be released from a refrigerant that is compressed by the compressor; a valve mechanism that selectively switches a refrigerant from the condenser to a first and a second flow channel (82F; 82R); a first and a second cooler (78F, 78R) that are individually provided in the first and the second flow channels (82F; 82R), respectively, and to which the refrigerant is selectively supplied; a throttling device provided between a side of a refrigerant inlet to the first and the second coolers (78F, 78R) and the condenser; a heat insulating storage cabinet that has a first and a second storage compartment (53F; 53R), in which the storage compartments (53F; 53R) are cooled by cold air that is generated by the respective coolers (78F, 78R); characterized by target temperature setting means for setting a target temperature for inside the first and the second storage compartments (53F; 53R); a temperature sensor (83F, 83R) that detects an internal temperature inside the first and the second storage compartment (53F; 53R), respectively; deviation calculating means that calculates a deviation between the target temperature that is set by the target temperature setting means and an internal temperature that is detected by the temperature sensor (83F, 83R) for each predetermined time period; deviation integrating means that integrates a sum of deviations for a predetermined number of times that are calculated by the deviation calculating means; and rotational speed control means that compares an integrated value that has been integrated by the deviation integrating means with a reference value, and changes a rotational speed of the inverter motor; wherein the target temperature setting means comprises storing means (43; 100) that stores a mode of variation with time of a target temperature, and the target temperature setting means is configured to sequentially output target temperatures that differ with a passage of time. a compressor that is driven by an inverter motor; a condenser that causes heat to be released from a refrigerant that is compressed by the compressor; a valve mechanism that selectively switches a refrigerant from the condenser to a first and a second flow channel (82F; 82R); a first and a second cooler (78F, 78R) that are individually provided in the first and the second flow channels (82F; 82R), respectively, and to which the refrigerant is selectively supplied; a throttling device provided between a side of a refrigerant inlet to the first and the second coolers (78F, 78R) and the condenser; a heat insulating storage cabinet that has a first and a second storage compartment (53F; 53R), in which the storage compartments (53F; 53R) are cooled by cold air that is generated by the respective coolers (78F, 78R); characterized by target temperature setting means for setting a target temperature for inside the first and the second storage compartments (53F; 53R); a temperature sensor (83F, 83R) that detects an internal temperature inside the first and the second storage compartment (53F; 53R), respectively; deviation calculating means that calculates a deviation between the target temperature that is set by the target temperature setting means and an internal temperature that is detected by the temperature sensor (83F, 83R) for each predetermined time period; deviation integrating means that integrates a sum of deviations for a predetermined number of times that are calculated by the deviation calculating means; and rotational speed control means that compares an integrated value that has been integrated by the deviation integrating means with a reference value, and changes a rotational speed of the inverter motor; wherein the target temperature setting means comprises storing means (43; 100) that stores a mode of variation with time of a target temperature, and the target temperature setting means is configured to sequentially output target temperatures that differ with a passage of time. wherein the target temperature setting means comprises storing means (43; 100) that stores a mode of variation with time of a target temperature, and the target temperature setting means is configured to sequentially output target temperatures that differ with a passage of time.