This article analyzes the discourse on Taiwanese women's clothing from 1930 to 1945 to explore the influence of war on gender issues under conditions of colonization. As the intensity of the war increased, more and more Taiwan males were forced to join the military. The Situation in Taiwan was very similar to that in Japan itself. Therefore, enhancing control of the home front, especially the mobilization of women, became a top priority of the Taiwan Governor-General Office. In fact, the colonial authorities' attention to Tajwanese women's clothing can be traced back to the initial stages of Japan's colonization of Taiwan. In the war period, the question returned. Issues such as the establishment of a so-called national costume and how to modify women's clothes to meet the needs of the war period aroused heated debate in domestic Japan as well. However, since the colonial society was mainly composed of Taiwancse, the issue of clothing was even more complicated in Taiwan. This article suggests that the alternation, in different times and places, of qipao, dresses and monpe in Taiwanese women's fashions from the late 1930s can best be understood from the perspectives of colonial politics and popular culture. Wearing qipao did not necessarily mean that Taiwanese women were displaying an anti-Japanese spirit, while wearing kimonos did not necessarily signify affection for Japan. As a means of women's self-expression, modern culture spread throughout the world even into the war period. In the name of war needs, the colonial authorities violently intervened in women's clothing issues. However, women also continued to search for their true identities throughout the war period.