In the era of artificial intelligence, Face recognition technology has made great progress in recent years. It has applications in all areas of our lives, including the field of library. This paper intends to use the method of network investigation under the background of "Face Scanning" and explore the status quo and trends of technology applied to the library to Face+Access Control System and Face+borrowing. Three aspects are consider and analyzed for the application of the technology in academic libraries and public libraries in the new era. With regard to services, it provides practical references.