The computer, the core of modern technology, is widely used in many industries, and is gradually taking its place as a useful tool which could satisfy various demands of all different arcas. Textile industry is no exception in this respect. Continuous research and investment in the new technology by textile industry has enabled textile designers to explore the possibility of replacing old fashioned processes of fabric pattern design, drafting, and pattern production with computer assisted processes. Computers are used even in the field of Weaving Design. Korea, however, is far behind other countries in Computer Assisted Weaving Design. Computer assisted weaving is still quite a new field waiting to be discovered, and imitation of foreign designs makes the situation worse by interfering with the development of original design of our own. Today, Weaving Design needs improvement in quality and Computer Weaving can be an answer. The purpose of writing this paper is to introduce Computer Weaving which has the potential of coming up with innovative and original design, and thus to help textile industry thrive. To understand the characteristics of Computer Weaving, it is necessary to introduce the hardware and software which make up the C.A.D (Computer Aided Design) system for weaving, and the computer assisted loom. Summer and Winter Weaving technique will be discussed, and how this technique, combined with PWS, could provide various weaving patterns will be demonstrated. PWS (Patternland Weave Simulator), the C.A.D. program which can be used in IBM PC Compatibles, will provide a first-hand experience of computer weaving from threading simple and complicated fabrics, treading, and tying-up without putting warps on the loom, and thus will prove its efficiency. The advantages of computer-assisted looms are demonstrated by producing real samples using SCHACH Loom, one of the computer-assisted looms which combine computers with Interface. At least five discernible advantages are explained. First, various fabric pattern designs using PWS enable the development of superior, efficient designs and the easy, fast production of complicated patterns. Second, PWS allows viewing the fabric patterns before actual production and thus makes pattern modifications easier. Third, the use of repeats and the change of colors are simplified to produce atmospheric variety. Fourth, the computer assisted loom which combines the computer with Interface economizes time and labor without affecting production. And last, Summer and Winter Weaving technique, which produces the effect of double weaving, is easier to operate than other weaving techniques. The computer is considered as the necessities of everyday life, and has taken its place on almost every area of society including culture and art. It has broadened its influence on the field of art from painting, sculpture and draft to weaving design. Computer Weaving was not introduced in the US until the beginning of the 1980`s. It wan introduced on Korea in early 1990`s by a few Korean weaving artists and later came to be included in college curriculum. Still, its future is very bright as long as schools and industries cooperate to help the spread of Weaving C.A.D. system and its practical and useful application. The challenge of textile industry is the development of original design which alone guarantees its thriving in the future. Domestically also there are many movements to innovate fabric design and create new markets by introducing computer systems. This paper is written as an attempt too make a small contribution to the development of textile industry by illustrating efficient design with minimal manual work, various weaving designs and color combinations, all made possible by C.A.D system for weaving.