An Internet of Things system, comprising: a functional system, a physical system, and an information system. The function system is an expression form of functions; the information system is an information implementation manner; and the physical system is a carrier that provides physical support for function implementation. The function system is of a structure consisting of five platforms: an object platform, a sensing network platform, a management platform, a service platform, and a user platform. The physical system and the information system are also of a structure consisting of five parts. The present invention elaborates the Internet of Things system, and accurately describes functions that should be implemented by Internet of Things and how to implement these functions from three aspects of the Internet of Things system, i.e., the function system, the physical system, and the information system. By means of these provided technical features, an Internet of Things system characterized by a clear structure, definite functions, matching hardware, and clear information running can be constructed, and its application range is wide.