The method of identifying old and new books with badges: version, and judging the old and new degree of books by version. Different versions of the same book have great differences in typesetting, paper use and binding, and the new version will be improved in typesetting, paper use and binding. Paper, the paper of new books is white and smooth, while the paper of old books will turn yellow and brittle. Cover, the cover of new books is generally bright and smooth, while the cover of old books will become old and damaged because of the passage of time. Collection number, some libraries and bookstores will mark the collection number or label on the books. The label of the new book is relatively new, while the label of the old book has faded or broken. Title page, through the title page of a book, you can see the publication time and version number of the book, so as to judge the old and new degree of the book.