Golden Composure has been drawn through the analysis on the characteristics of each region based on the survey analysis in order to develop the west sea marine tourist trains with the characteristics of eight localities including Cheonan, Asan, Yesan, Hongseong, Boryeong, Seocheon, Kunsan, and Iksan, Boryeong, Seocheon and we came up with a big idea, concept and design details. We represented the theme of meeting the golden sea, tidal flats, islands, wind, sky, and sun, and expressed abundant nature and resources of the Yellow Sea. In addition, the various colors that can contain and express the whole landscape of the west coast area are applied harmoniously to each train section, and produced the mood that the gold dust is scattered when the train runs on the west coast under the sunlight.