With the in-depth development of the Internet of Things technology, its applications have begun to cover all walks of life, such as smart agriculture, smart industry, smart wear, smart finance, and the Internet of Vehicles, which are all industries involved in IoT cards. In 2022, IoT cards will also be applied in the following new field industries. 1. The application of IoT cards in smart libraries The Internet of Things realizes the unified management and control of the library, which can be realized through the Internet of Things devices distributed in all corners of the library: 1. Set permissions, manage different books, and have a clear division of labor. 2. Energy saving and environmental protection. Through intelligent connection with air conditioners, it can adjust the temperature changes of each area in the library, avoid waste, and improve the reading experience of readers and the service quality of the library. 3. Detect the electricity consumption. If there is an abnormal situation,…