In the study of democratization, democracy is divided into thin and thick governance. Since the installation of democratic institution for the past two hundred years, there are at least three waves of global democratization. Taiwan and other Asian countries are grouped as the late comers in the third wave. In order to consolidate democracy and avoid recession, countries around the world begin in the 21st century to push for deliberative democracy as one type of thick governance. Among the innovative mechanisms, to expand opportunities for citizen participation and to emphasize people centered practice in the sustainable city governance are pivotal. This class, under the above mentioned academic and practical context, wishes to begin by introducing the theoretical concept of thick democracy. Then the SDG 11 Sustainable City proposed by the United Nations in 2015 and how local government and private sectors integrate citizen wisdom and participation to transform city from unsustainable governance, lifestyle or mode of production into sustainable path for enhancing adaptive capacity of human in flighting climate change are explored. The course design is fourfold. By starting with understanding why we need citizen participation, the next section introduces sustainable city related international policy tools and theoretical debate. The third part uses 7 sub-goals in SDG 11 as theme to introduce citizen participation cases in different parts of the world. Lastly, toward the end of the semester, the course will utilize World Café technique to organize a citizen forum for discussing issues of sustainable city and our common future. Through table host role play, shifting table and idea exchange, participating students are expected to integrate what they have reflected into a policy recommendation white paper as final report in order to simulate the experience of acting as owner of the city.