Abstract: It is very important for Internet of Things as a new kind of global information engineering to understand the concept itself (including the semantics, the properties and the category) clearly. Analyzing the semantic meaning of the word Internet of things can help to understand the properties of Internet of Things. Comparing the similarities and differences of the entity Internet of Things and other Internet applications can help to classify the entity. The actual semantics of Internet of hhings is Internet of product information, a new type of Internet application. Chinese translation of "Internet of Things" is the failure to highlight the two key points "information" and "based on Internet". The properties of Internet of Things include the dominance and the attributes. The former means the interconnection of product information in different parts of the world based on Internet, while the latter further explains the three restrictive characters of the product information, namely the electronic tag form, the standardizing restraint, and the ontology supporting. Internet of Things can be deemed as a specific application form of Semantic Web.

Key words: Internet of things, Product information, Internet application, Ontology, Semantic Web