The embodiment of the invention provides a caching method and device for the Internet of Things. The method comprises the following steps of: receiving an interest packet sent by a previous hop node,obtaining the information of the requested content carried by the interest packet, a cache node list and a relative popularity correction parameter, and obtaining the relative popularity of the requested content after updating according to the relative popularity of the requested content before updating, the relative popularity correction parameter and the average request arrival rate of the requested content; if it is known that the requested content does not exist in the local cache through judgment, whether the requested content is cached or not is judged according to the relative popularity of the requested content after updating; and updating the interest packet according to the judgment result and the relative popularity of the requested content after updating, generating a new interest packet, and sending the new interest packet to the next hop node. According to the caching method and device for the Internet of Things provided by the embodiment of the invention, an edge feedback caching strategy based on relative popularity is adopted, so that the data hit rate in the network can be increased, and the request time delay can be reduced.