With the rapid development of science and technology, culture, education and other fields, people’s demand for library and information materials is increasing, and the traditional library and information management can no longer meet this demand. However, at present, the security of library and information management has become an important issue to be solved. Library and information management should also prevent external intrusion to ensure that users and administrators manage within their authority, so as to stop unauthorized operations in time, and timely detect and stop illegally changed documents. This paper aimed to study the effectiveness of artificial intelligence (AI) security and library and information management in the Internet of Things (IoT). This paper proposed RSA (Rivest-Shamir-Adleman, RSA) algorithm to encrypt books and information. However, the algorithm had limitations. Therefore, the Elliptic Curve Cryptography (ECC) algorithm has been adopted again. ECC is currently the most effective and feasible solution for large-scale distributed open networks. The scheme has adopted the characteristics of hierarchical group management, fewer keys stored in nodes, less calculation of key update, and historical group key storage mechanism, which met the needs of file management. The experimental results in this paper showed that when the size of the tested document was 15M, the time for RSA and ECC to encrypt the document was 42ms and 40ms respectively. When the document size was 90M, the time for RSA and ECC to encrypt the document was 502ms and 256ms respectively. It can be seen that the encryption time of the two algorithms is similar when the document is small. However, as the document becomes larger and larger, the encryption time of the two algorithms has been widened. Keywords: Library and Information Management, Rivest Shamir Adleman, Artificial Intelligence, Internet of Things, Elliptic Curve Cryptography