Abstract: The present invention relates to a method and a system for generating MARC data in real time, and the method for generating MARC data in real time, according to one embodiment of the present invention, can comprise the steps of: (a) constructing a database by using MARC data and book information about a book having the MARC data generated therein; (b) receiving book information about a new book, and generating MARC data of the new book on the basis of the database and the received book information about the new book; and (c) providing the generated MARC data about the new book to a user.