A semantic client, a semantic information management server, a method of generating semantic information, a method of searching semantic information, and a computer program recording medium for performing the methods, the semantic client including: an identification (ID) generator to generate an ID of a target content; and a descriptor generator to generate a descriptor that defines correlations between the target content and one or more other contents. Furthermore, the semantic information management server includes: a semantic information database (DB) to store a descriptor including information about an ID of contents and correlations among the contents and other contents related to the contents; and an agent to search semantic information of the related contents with reference to the semantic information DB. Therefore, since contents have their own IDs, a user can easily search the contents.