Abstract: An intelligent pattern preparation system is presented in this paper. Its hardware is introduced briefly. The system can be used to prepare not only patterns for jacquard but also that of printing textile. Its feature of pattern design is that the input contours of source materials are extracted first, then, pressed on equal slope by a computer, and stored in its reservoir. The system creates patterns automaucally by means of a restrictive-random change method according to a mathematical model. After technological processing, the patterns created are output for making pattern carriers.