The present invention provides an evaluation device that judges and evaluates an appropriate margin for energy to be expended on quality control factors or the control and maintenance of quality control factors. The energy evaluation device (4) of the present invention is a device for evaluating energy consumption by an air conditioner (2) that regulates air temperatures, such that the air temperature to be managed meets management criteria, and comprises: an air temperature obtaining unit (6) that obtains a measurement value for the air temperature; an air flow volume obtaining unit (7) that obtains a value for the air flow which is a factor in the energy consumption of the air conditioner (2); an air flow limit specification unit (8) that specifies the air flow value as the air flow limit value when the air conditioner (2) is operated such that the air temperature reaches a limit value that fulfills management criteria, based on the relationship between air temperature changes and changes in air flow obtained beforehand; and an excess energy specification unit that specifies as excess energy the difference between the energy consumption of the air conditioner (2) corresponding to the air flow amount obtained by the air flow obtaining unit (7) and the energy consumption for the air conditioner (2) corresponding to the air flow limit value.