This study analyzed and discussed the competition relation between various media platforms, particularly fashion magazine, the Internet portal, and social networking (SNS) that provide fashion contents. The following results were obtained through this study. First, the Internet portal ranks the highest in all factors, followed by SNS, and fashion magazine as the lowest. Second, the Internet portal was competing with fashion magazine and SNS because there is an overlap between the two platforms. By contrast, SNS has a relatively low degree of overlap with fashion magazines, and they are complementary to each other. Third, the Internet portal has a strong advantage over fashion magazine and SNS in all factors. On the basis of the results of this study, we can summarize remarkable points in strategy formulation as follows. First, the Internet portal, which is popularized by “usage accessibility,” is expected to continue to dominate the competition over other media platforms while providing greater gratification to users of fashion contents. Second, the competitiveness of fashion magazines, which has been shrinking dramatically, lies in the diversity and quality of fashion contents. Innovating ways to develop creative fashion content and improve the quality through more in-depth analysis of the reader is essential. Third, SNS is slightly behind the Internet portal as a whole; however, it is one of the emerging platforms in the fashion content market because of its competitive advantage in terms of gratification opportunities.