The invention provides an extraction method and a device for Internet-oriented meaningful strings. The extraction method comprises the following steps: extracting repeated character strings and filtering the character strings sequentially by in-string analysis, out-string analysis and among-string analysis; and the extraction device comprises a repeated string discovery module, an in-string analysis module, an out-string analysis module and an among-string analysis module which are successively connected in series. The invention can effectively extract meaningful strings on news pages and forums, and can be widely used in the fields of network public opinion management, Internet intelligent information processing and the like.