Abstract: A system for distributing broadcast contents, in which the copyright of the broadcast contents can be protected, is provided. The system is a watermarking application system for broadcast contents copyright protection, constituted by a broadcasting station of broadcast contents, a broadcasting receiver of the broadcast contents, a network monitoring agent for monitoring secondary contents of the broadcast contents, a secondary content player for playing secondary contents, communication receivers for recognizing distribution of secondary contents, etc. Pieces of digital watermarking embedding equipment are provided in the broadcasting station and the broadcasting receiver respectively. Pieces of digital watermarking extraction equipment are provided in the network monitoring agent and the secondary content player. Particularly, the broadcast contents are outputted through an analog output or an internal disk.