Internet of Things (IoT) is a rapidly evolving technology that has the potential to transform the way libraries operate and provide services to their patrons. By connecting devices and systems to the internet, libraries can gain access to real-time data and automate many of their processes, leading to more efficient and effective operations. This paper explores the use of IoT in libraries, specifically focusing on how it can enable smart libraries in the digital era. The paper will discuss the benefits and challenges of implementing IoT in libraries and provide examples of how libraries are currently using IoT to improve their services. The paper will also explore the future possibilities of IoT in libraries and how it can be used to enhance the user experience and support the development of new services. Overall, this paper will provide an overview of the IoT technology and its potential to revolutionize the way libraries operate and provide services to their patrons in the digital era.