This chapter introduces the reform of teacher preparation for primary General Studies teachers and secondary science teachers to implement STEM education in the Hong Kong Special Administrative Region (Hong Kong/ HKSAR) of China. In response to the call for the promotion of STEM education in recent policy addresses, STEM education is to be promoted through the Key Learning Areas of Science Education, Technology Education, and Mathematics Education in the school curriculum. Given the imperative role that teachers play in the provision of quality STEM education, the government, universities, and other stakeholders have contributed significant resources and funding to provide training programmes, workshops, projects, and research to prepare teachers to provide students with relevant school-based STEM learning opportunities. The discussion includes mainly pre-service teacher education comprising the degree programmes, subjects, and courses offered at undergraduate and postgraduate levels to nurture qualified teachers in STEM education and some brief information about in-service teacher professional development. Data is collected and analysed from government reports, policy documents, research articles, discussion papers, and programme information on STEM education and teacher education. This chapter provides an overview to inform future directions of teacher preparation for STEM education in Hong Kong. Copyright © 2023 The Author(s), under exclusive license to Springer Nature Switzerland AG.