The rapid developing Internet has become an important reflection of public opinions. It has been an urgent problem to be solved how to analyze and monitor public opinions in digital media and on Internet, and how to timely and effectively spot all kinds false information harmful to social security, in order to promote the healthy development of information security and content supervision. This paper proposes a www-based digital media content public opinion analysis model. A digital media content public opinion analysis system based on the Internet is designed and realized, and the practical key technologies are discussed.