OPERATING STATE JUDGMENT APPARATUS AND WIRELESS POWER TRANSFER SYSTEM

The processing part is configured to calculate an elapsed time from an inspection date or installation date of a power transmission apparatus installed at a location of occurrence of an abnormality to a date of occurrence of an abnormality based on the inspection information and information on occurrence of an abnormality relating to the location of occurrence of an abnormality and date of occurrence of the abnormality where the power transfer efficiency from the power transmission apparatus to the power reception apparatus received from the mobile object through the communication part becomes less than a predetermined value, and is configured to judge an operating state of the power reception apparatus based on the elapsed time.