The invention is suitable for the technical field of internet, and provides an identification method and system for history waste information. The method comprises the following steps: when receiving a request of browsing an appointed webpage, extracting content feature information of the appointed webpage, according to a feature recognition algorithm stored in a preset knowledge base, carrying out matching identification on the content feature information of the appointed webpage and the feature information stored in the preset knowledge base, acquiring an identification result, and according to the identification result, identifying whether the information in the appointed webpage belongs to the history waste information or not. Through the identification to the history waste information in the webpage based on read-check, the identification cost is enabled to be reduced, and the identification rate, the real-time performance and the adaptability are improved.