Abstract：Library Intelligent Book Recommendation System Using Facial Expression Recognition To solve the problem of information overloadthe recommendation system has developed in various fieldsFaced with a variety of forms and rich masses of booksthe book recommendation system based on various recommendation methods is applied in the libra Consulting ServiceRecommending books through user facial expression recognitionLibrary AutomationWhen this recommendation system is applied to library robotsA convolutional neural network modela deep learning techniqueis used to achieve facial expression recognitionThis technology is used to identify userspreferences and recommend books based on these preferencesWhen this recommendation system is applied to library robotsit can enhance the user experience