Abstract: This paper introduced the contents, features and main influencing factors of library users' emotion, and analyzed the relationship and component factor between library users' emotion and their satisfaction and loyalty, and studied the main ways to enhance users' satisfaction and loyalty based on users' emotion, so as to adjust and innovate the mode of information service according to users' emotion, construct perfect service architecture starting from users' value information needs, psychological characteristics and lending interest, enhance customer satisfaction and loyalty and promote development of China's library.