The main investigation of this thesis is about the comparative analysis of the fashion style preferences in the ages of 20-30 women, according to the style, by researching the area of Dalian and Seoul, represented as outstanding fashion cities in north eastern area. Both taking pictures and recording camcoders were performed at the famous fashion street in Seoul and Dalian. The period of investigation was from 24th of July to 2nd of August 2008. The result of research are as follows. Generally, the casual style was predominant in both area. The jean casual in Seoul was somewhat tidy and conservative, while that in Dalian showed the tendency of boldly exposed their body. In terms of easy casual, T-shirts and mini-tight skirt were preferred in Seoul, while T-shirts and midi-flare skirt was popular in Dalian. In Seoul, the blouse and mini skirt were in vogue, while one-piece dress, blouse and 5/7/9 length pants were prevalent in Dalian, in case of romantic style. The sports casual was relatively low in frequency in both areas, however, it was relatively more popular in Dalian than in Seoul. The frequency of classic style was similar in both areas. The T-shirts/blouse and Chanel-line skirt were preferred in Seoul, while the combination of jacket/shirts and full-length straight pants were preferred in Dalian. The one-piece dress was predominant in feminine style, the combination of mini one-piece dress and shoulder bag prevalent in Seoul, while the combination of Chanel-line one-piece dress designed as boldly exposed body was popular in Dalian, which shows the tendency of sexy, feminine style. The clear contrast or differences of street styles in Seoul and Dalian would become evident by this research. The continuous investigations into the various regions of China would be expected as an important measure for the successful launching into the Chinese fashion market.