The purpose of this study is to create modern patterns based on considering the types and design elements of Joseon hwapo patterns containing Korean identity, and to develop costume designs by applying design elements of traditional Korean dress, Hanbok. These designs combine traditional costumes with modern sensibility using the attribute listing method, and present them using a 3D virtual clothing program. Through this, it is meaningful as it organizes data on Joseon hwapo patterns, which were rarely dealt with in the traditional Korean costume research, and it is also of research value as it is a work that utilizes Joseon hwapo patterns as a new source of fashion design development. As a research method, literature research was conducted based on the documents, 'Nabeshima-sarasa hidensho', 'Nabeshima-sarasa mihoncho', and 'Zoho kafu benran', which are related to Joseon hwapo remaining in Japan. Based on the literature research, research was performed by creating pattern design and costume design using the attribute listing method, and 3D virtual clothing. Traditional Korean costumes used in design development in this study were saekdong-jeogori, dolddi-jeogori, magoja, hongjangsam, durumagi, jungdan, gollyongpo, jeogui, breast band, mujigi-chima, chima, and baji. Further, accessories used in each costume, such as pyeseul, daedae, hapi, and jeonhaeng-utchima, and features of configurations, such as yongbo, chest ribbons, band hem, gusset, collar and dongjung, heorimalgi, neckline, and sapok line, were used for design development.