INFORMATION ACQUISITION DEVICE, INFORMATION PROCESSING SYSTEM, ESTIMATION DEVICE, INFORMATION ACQUISITION METHOD, ESTIMATION METHOD, CONTROL METHOD, AND COMPUTER-READABLE RECORDING MEDIUM

An information acquisition device includes an attachment/detachment information acquisition unit configured to acquire, regarding a first terminal provided in a power storage device and a second terminal provided in an electrical power device and is configured to be attachable/detachable to/from the first terminal, a number of times of attachment/detachment between the first terminal and the second terminal. An estimation device includes an estimation unit configured to estimate, regarding a first terminal provided in a power storage device and a second terminal provided in an electrical power device and is configured to be attachable/detachable to/from the first terminal, a deterioration degree of at least one of the first terminal or the second terminal. A storing device configured to be capable of storing a plurality of power storage devices includes: a plurality of second terminals respectively corresponding to a plurality of first terminals provided in each of the plurality of the power storage devices, each of the plurality of the second terminals being configured to be attachable/detachable to/from a corresponding one of the plurality of the first terminals; a deterioration information acquisition unit configured to acquire deterioration information indicating a deterioration degree of each of the plurality of the second terminals; and a selection unit configured to select, based on the deterioration information acquired by the deterioration information acquisition unit, the power storage device to be provided to a user out of the plurality of the power storage devices.