The iron flower window refers to a building component that uses black iron as a material and is manually bent and formed by a blacksmith. In addition to protection and anti-theft, it also has decorative purposes. Stained steel windows can reflect part of Taiwan’s early ordinary people’s aesthetics. Stained steel windows have been gradually replaced by new-style iron windows since 1990 due to their difficult maintenance and labor-intensive work. Symbol research, with its crafting techniques, can also trim the influence of Japanese occupation on Taiwanese architecture. Related papers further explore the use of iron bars, patterns and shadow elements, which will provide more records and information for the preservation and preservation of the precious and special traditional street house culture.