A management apparatus that manages a power state of an information processing device comprising: management means for managing a first power control rule for a change of a state of the information processing device; obtaining means for obtaining information of a power control ability of an information processing device; determination means for determining (S107; S2207), based on the information obtained by the obtaining means, whether or not the power control ability of the information processing device matches the first power control rule; setting means for setting (S108-S111; S2208-S2211) the first power control rule to the information processing device if it has been determined that the power control ability of the information processing device matches the first power control rule, and setting a second power control rule that matches the power control ability of the information processing device if it has been determined that the power control ability of the information processing device does not match the first power control rule; detection means for detecting the change of the state of the information processing device; and control means for performing power control (S1206, S1207) over the information processing device based on the change of the state of the information processing device and on the power control rule that has been set by the setting means; wherein if it has been determined that the power control ability of the information processing device does not match the first power control rule, the setting means sets the second power control rule based on a pre-set operational configuration, the operational configuration being a configuration indicating whether to prioritize power saving or to prioritize continuation of an operation of the information processing device in power control. management means for managing a first power control rule for a change of a state of the information processing device; obtaining means for obtaining information of a power control ability of an information processing device; determination means for determining (S107; S2207), based on the information obtained by the obtaining means, whether or not the power control ability of the information processing device matches the first power control rule; setting means for setting (S108-S111; S2208-S2211) the first power control rule to the information processing device if it has been determined that the power control ability of the information processing device matches the first power control rule, and setting a second power control rule that matches the power control ability of the information processing device if it has been determined that the power control ability of the information processing device does not match the first power control rule; detection means for detecting the change of the state of the information processing device; and control means for performing power control (S1206, S1207) over the information processing device based on the change of the state of the information processing device and on the power control rule that has been set by the setting means; wherein if it has been determined that the power control ability of the information processing device does not match the first power control rule, the setting means sets the second power control rule based on a pre-set operational configuration, the operational configuration being a configuration indicating whether to prioritize power saving or to prioritize continuation of an operation of the information processing device in power control.