Abstract: Provided are a system for determining infringement of copyright based on the text reference point and a method thereof. The reference points are extracted automatically by using the text reference point of a window unit instead of a sentence or a paragraph unit, and the infringement location of copyright can be found based on the extracted reference point. The system and method improve the copyright infringement diagnosis speed and provide the expandability of the system by using the search engine in order to index the reference point information.