The objective of this paper is to assess the learning outcomes of service-learning programs organized by a residential college (RC) of a university in Macau, China by exploring students’ global citizenship. Fully in operation since 2014, the new RC system is aiming at integrating students’ in-class and out-of-class experiences. Service-learning tends to become an important part of the RC programming so as to foster students’ generic skills and civic engagement. However, in view of the young development of the university’s service-learning programs, the impact of such programs is still uncertain. Thus, systematic research into this area is urgently needed in order to improve the RC programming. Since the summer of 2013, the RC under study has organized a number of service-learning programs, particularly trips to Laos, Taiwan and Mainland China. Currently in progress, this study is based on a self-assessment questionnaire survey that applies a three-dimensional Global Citizenship Scale developed by Morais and Ogden (2011) that encompasses social responsibility, global competence, and global civic engagement. The first test will be conducted in March 2015 when the service-learning trips to Mainland China in the coming summer will start recruitment. On a voluntary basis, it aims to sample approximately 100 students, about one-fifth of all students in the RC. Valid responses will be grouped into three primary categories: (1) students who participated in at least one of the service-learning programs organized by that RC; (2) those who did not participate in any of such programs but joined other service-learning programs outside the RC; and (3) those who did not participate in any of such programs. Global citizenship of students of different categories is compared. The hypothesis is that global citizenship of category (1) students will be significantly weaker than that of students of categories (2) and (3); while those of categories (2) and (3) have no significant difference. To further the research on measuring the outcomes of the RC service-learning programs, the scale will also be used as a pre- and post-test instrument to explore the global citizenship of student participants of the forthcoming summer service-learning trips.