The present invention relates to a data concentration unit and an operating method thereof. To this end, the data concentration unit of the present invention includes: a substrate; and a data communication unit for collecting meter reading data of a plurality of customers through communications with power metering communication modems respectively connected to watt-hour meters provided for the plurality of customers, wherein the data communication unit includes at least one wired communication module for performing wired communication with power metering wired communication modems, and at least one wireless communication module for performing wireless communication with power metering wireless communication modems, and the wired communication module and the wireless communication module are inserted and provided into the substrate.