1. A system for automatically detecting an abnormality, the system comprising: a plurality of information supplier platform apparatuses configured to generate statistical usage data related to the use of electronic information; and an abnormality detection apparatus configured to collect the statistical usage data related to the use of the electronic information from the plurality of information supplier platform apparatuses, determine statistical usage data that matches a standard data format among the collected statistical usage data as a target subject to abnormality detection, detect a predetermined abnormality for each type in the statistical usage data determined as the target subject to the abnormality detection, and generate a notification message for notifying of the detected abnormality for each type.