隨著全球化發展，台灣的跨國婚姻日益增加。本文以一位北愛爾蘭男性「台灣女婿」為研究對象，探討其在台長期居留的動機與身份認同轉變歷程。研究發現，個案具高度文化整合策略，透過語言學習、家庭支持與積極參與社會，成功克服文化差異，逐步由「台灣女婿」轉變為自我認同的「台灣人」。本研究結合Berry的涵化理論與身份認同相關觀點，補足西方男性在台跨國婚姻經驗的研究空白，並提供促進文化融合與支持跨國婚姻實務的參考。

With the rise of globalization, transnational marriages in Taiwan have steadily increased. This study explores the case of a Northern Irish man, a "Taiwanese son-in-law," focusing on his motivations for long-term residence and transformation of identity. The findings show that the participant adopted a high level of cultural integration strategy, overcoming language and lifestyle differences through language acquisition, family support, and active social participation. Over time, his identity shifted from a foreign spouse to a self-identified "Taiwanese." Drawing on Berry’s acculturation theory and identity construction frameworks, this research addresses a gap in studies on Western male immigrants in Taiwan and offers insights for enhancing cultural integration and support mechanisms for transnational marriages.