Service-learning (SL) is a pedagogy that can consolidate students' learning of academic knowledge and nurture their care about the needy in the community. In the West, SL is a popular pedagogy to promote civic engagement in high school students. In contrast, although high schools in Hong Kong emphasize the importance of community service provided by high school students, such service is seldom conducted within the context of academic service learning. In response to the lack of systematic academic SL programs for high school students in Hong Kong, we have launched a project supported by Chow Tai Fook Charity Foundation and Keswick Foundation to promote SL amongst high school students in Hong Kong. Besides developing an online training program on Service-Learning for high school students, we argue that there is a need to strengthen the leadership foundation of students who intend to carry out SL. As such, we have developed an online Service Leadership education program based on the Service Leadership Theory, which highlights the importance of 3Cs (competence, character and care) of an effective leader. In this paper, we outline the design and content of an online Service Leadership education program for high school students which is unique in the literature on youth leadership particularly in different Chinese contexts. © 2023 Nova Science Publishers, Inc.