The Internet of Things refers to the connection of any object to a network through information sensing devices and agreed protocols. Objects exchange and communicate information through information dissemination media to achieve intelligent recognition, positioning, tracking, supervision, and other functions.

There are three key aspects in IoT applications, namely the perception layer, network transport layer, and application layer.

The Internet of Things in the sense of "smart dust" belongs to the generalization of industrial buses. This kind of industrial practice has never stopped in industrial production since mechatronics integration and industrial informatization, but it was called industrial bus instead of IoT at that time. In this sense, the Internet of Things will steadily advance based on the development of sensing technology and various local area network communication technologies, in accordance with its inherent scientific and technological laws, and will not accelerate its development speed due to human activities.