A method for identifying motion video content, forming a registered fingerprint database in advance for video contents of broadcasting video signals, wherein said method at least comprises the steps of storing a consecutive of video frame images of a motion video content to be identified into a frame buffer; obtaining sample values on the video frame images by a frame sampler; holding the sample values in a fingerprint store as a fingerprint A for search in the fingerprint database; and performing a fingerprint pattern matching algorithm between the fingerprint A for search in the fingerprint database and fingerprints B contained in the fingerprint database so as to determine whether the motion video content has ever been broadcasted before. The method according to the present invention can effectively organize, archive, and search video content; lower the cost of digital storage devices; and identify video content efficiently and with minimal or no human interactions.