Using new technologies such as the internet and face recognition, the new cafeteria management mode was developed. With the use of this system, we can: pick up by face scanning, reducing queueing time and enhancing experience; manage the preparation and purchase more precisely, reducing waste and upgrading the match between meals and customers; unify accounting and management, providing a clear book-keeping record. If promoted in the public, SaaS will increase the preparation efficiency and reduce waste of food.