With the advent of globalization, there has also been a growing concern with the issue of international disaster management. In order to pursue the better outcomes in global disaster management, international cooperation is inevitable. Various theories of international relations, such as functionalism, realism, liberalism, and social constructivism, suggest different approaches to exploring the nature of international cooperation. In the era of globalization, however, states are no longer the only authorized actors in global issues. In other words, the emergence of global governance has posed a challenge to traditional views of international cooperation. To be more specific, this study focuses on the questions of how diverse global actors and the structure of global governance network have influenced international cooperation, especially on the issue of disaster reduction. Through case study method, this paper explores the tremendous damage that resulted from the Indian Ocean tsunami of 2004 and the engagement of the global society in disaster recovery and reduction. This paper adopts Rational Choice and Social Capital as approaches to analyzing the major research questions. The unit of analysis is organization. We conducted in-depth interviews and surveys of different organizations to collect data for this research. Through this research, we expect to go deep into the discussions of global governance and international cooperation.