A method for providing a service through a stamp service server, includes: receiving user information and beacon information from a user terminal, wherein the user terminal recognizes a beacon signal output from a beacon device and transmits the beacon information contained in the beacon signal; extracting stamp information matching the received user information on a stored database; providing the extracted stamp information to a POS (Point Of Sale) corresponding to the beacon information; receiving stamp saving information or stamp use information from the POS terminal; and generating or updating stamp information matching the user information included in the stamp saving information or the stamp use information.