Blind digital watermark detection method and system

The invention discloses a blind digital watermark detection method and a blind digital watermark detection system. The method comprises the following steps: binding an identification file and an ID number so as to form a digital watermark file, and storing the identification file, the feature information of the identification file and the ID number into a database; embedding the ID number and the identification file into a carrier file, and storing the ID number and a corresponding embedding algorithm thereof into the database; extracting the ID number of the digital watermark file from the carrier file, matching the extracted ID number with the ID number in the database, and according to the ID number of the digital watermark file, acquiring the feature information and embedding algorithm of the corresponding identification file from the database; and according to an identification file extraction algorithm and feature information corresponding to the acquired embedding algorithm, extracting the identification file of the digital watermark file of the carrier file. By using the technical scheme in the invention, huge amounts of multimedia data can be subjected to quick and simple watermark detection and extraction.