The researches on modern fashion design have more specific and multifactorial, and expressional approaches of designers become more deeverse too. And, at the present point time when the design itself extends actively throughout the world, there should be may studies that focus on the development of CAD system. This study research that computer adied design used in developing various design and variety training. Development of fashion design by using computers could contribute to the rapid composition of deverse researches on it. It is to be classified into three items, diagram, illustration, transformation in computer adied fashion design. The illustration could be color variation by using CAD system, and express correct form, adjustment, complement. It must be development as an expression of propaganda, having a artistic value of ganre. At the present point of time when the fashion design itself it needed development, there should be may studies that focus on development of fashion design by using computer. This study present diagram for practical side, and illustration for decorative side by using CAD system.