A kind of Korean traditional jacket, Baeja, has been a Korean traditional costume equipped with practicality and formative aesthetics from the Three Kingdoms period to the Joseon Dynasty. Accordingly, the researcher of this study highly valued a modern sense of Baeja with various types of design and forms and attempted to make efforts to apply it into modern life. This study provided a new direction in the modernization work of traditional costumes by creating fashion images newly interpreted corresponding to a modern sense and trend through the application of formative characteristics and noticeable elements via the coordination of traditional Baeja and modern costumes. On the one hand, it would be meaningful in terms of contributing to the activation of traditional Hanbok by providing people with ample opportunities to wear it in modern daily lives variously. On the other hand, the actual purpose of this study was to perform a modernization work for traditional costumes by attempting to conduct a crossover that could let people move into other areas freely, that is, a creative and innovative research associating the area of costume history and that of coordination.