The development of bilingual education has rapidly grown in the past few decades, with v and ying implementations reflecting each country’s political, social and cultural contexts. In response, the Taiwanese government launched the Bilingual 2030 policy in Taiwan to improve international competitiveness and communication. Employing the FERTILE model as the theoretical framework, this case study focuses on (1) comprehending the role of the administrative team in implementing bilingual education within schools and (2) exploring the function of bilingual teacher professional learning communities. The results indicate that the involvement of school administrative teams, along with the support from BPLCs, are essential for implementing bilingual education in schools. More importantly, this research highlights the importance of administrative teams in providing a supportive environment. Also, the support from administrative teams is significant for enhancing the function of BPLCs, which play a key role in improving teachers’ instructional strategies. The findings of this study can generate both theoretical and practical contributions to bilingual education in Taiwan. First, the findings provide schools and policy makers in Taiwan with valuable insights for fostering bilingual teacher professional learning communities. Second, the findings from the two case studies, which utilised the FERTILE model to implement bilingual education, can serve as references for its nationwide promotion.