This book introduces the development and technical level of water-jet loom, the basic principles and main technical characteristics of five major motion mechanisms, such as shedding, weft insertion, beating-up, winding and let-off, auxiliary mechanisms and equipment such as starting brake, weft selector, weft storage and dobby, the principle of electrical control circuit, production technology management, the configuration of weaving capacity, the causes and elimination of operation failures, the setting and adjustment of weaving technology, product development and the elimination of common fabric defects.