The research on teacher learning in the field of foreign language teaching has been conducted later than that in general pedagogy. Professor Kang Yan's book provides a comprehensive review of foreign language teacher learning research, consisting of theoretical analyses, empirical research reviews, and an outlook on foreign language teacher learning research. The book examines the evolution of strategies aimed at enhancing the learning environments for foreign language teachers and presents authentic findings, including negative results. It also makes a significant contribution by offering valuable insights into the methodological approaches employed in foreign language teacher learning research. The book's contributions equip readers, educators, and researchers with a comprehensive understanding of foreign language teacher learning research, empowering them to engage with the subject, conduct research, and contribute to the advancement of the field. However, some limitations are noted. The book helps readers understand the basic concepts, theoretical foundations, and methodologies of foreign language teacher learning and allows us to recognize the current status of research and how to improve the learning environment and effectiveness of foreign language teachers.