1. A system for automatically detecting an abnormality, the system comprising: a plurality of information supplier platform servers configured to generate statistical usage data related to the use of web-based electronic information downloaded to personal computing devices of users; and an abnormality detection server configured to: collect the statistical usage data related to the use of the web-based electronic information from the plurality of information supplier platform servers, determine statistical usage data that matches a standard data file format among the collected statistical usage data as a target subject to abnormality detection, determine if there is overlapping statistical usage data: if there is overlapping statistical usage data that are the same, store one of the overlapping statistical usage data, and if there is no overlapping statistical usage data, store the statistical usage data, detect a predetermined abnormality for each type in the statistical usage data determined as the target subject to the abnormality detection, generate a notification message including an email or text message for notifying of the detected abnormality for each type, and transmit the notification message to a selected one of the plurality of supplier platform servers.