Amid increasing environmental damage to the world, the need for international cooperation in environmental protection research is becoming more significant. Korea supports the sustainable growth of developing nations based on its own recent experience of fast-paced growth. In particular, we are witnessing a growing demand for partnership projects, which aim to prevent environmental pollutions and the excessive use of resources that may follow development. This research report delivers the performance over the past three years, since 2011, for the protection and sustainable use of the natural environment in Southeast Asia, in partnership with the Ministry of Forestry and the National Park under the Ministry of Indonesia. Through the joint research, the two nations mutually examined, compared, and understood how the collaboration on the conservation of the natural environment has been implemented. The research investigated a diverse range of topics, from the policies on the management of natural parks and visitor management to those on biodiversity and how to resolve issues regarding the community and its people. We also shared constructive ideas and built mutual trust, which will serve as the foundations for our future collaborations. I hope that the research results and the proposed projects of this collaboration will reap tangible outcomes and further boost the cooperation between such diverse fields.