The invention provides a cache decision-making method and device. The method comprises the following steps that a PCF receives first cache information sent by at least one local analysis function LAF,wherein the first cache information comprises a base station identifier, identifiers of the first N1 pieces of application information with the maximum access frequency and contents corresponding tothe identifiers of the N1 pieces of application information, N1 is a positive integer, and the PCF determines the local cache content according to the first cache information and the capacity of the local cache. Therefore, the hit rate of caching can be effectively improved, the transmission bandwidth and the data transmission cost are greatly reduced, and the network use experience of a user is improved.