There have been discussions on what is and whether we have 'global citizenship', since the focus of citizenship education has always been on the nation-state's political sovereignty and on citizens' rights and responsibilities. Nevertheless, globalization has challenged the notion of citizenship and citizenship education. Schools and NGOs in Hong Kong have engaged themselves in global citizenship education after the education reform in early 2000. This paper attempts to characterize global citizenship education in Hong Kong, which shows learning themes such as moral obligation to the world, "learning to live together" through understanding and respect for other peoples and cultures, and concerns for peace and human rights. Hence, as a dynamic process, the school-based curriculum such as project learning and civic education has continually revised their goals.