Nuclear medicine is a complex Technology which is constituted by the integration of clinical practice, scientific research and strategic issues, supported by the inspiration, aspiration and perspiration of its dedicated professionals, and sustained by the consistent and systematic activities of various international and governmental organizations. Throughout the last 40 years, Nuclear medicine has emerged dramatically as a truly promising field in Korea through the progress and proliferation of research, technology and practice which was stimulated by multiple driving Forces as follows: foundation of the Korean Society of Nuclear Medicine, publishing related books and printed materials, host of the 3rd Asia and Oceania Congress of Nuclear Medicine and Biology, establishment of Korea Board of Nuclear Medicine, host country for World Federation and Congress of Nuclear Medicine and Biology, international cooperative activity through IAEA, JSNM, SNM, CJK, EANM and ARCCNM, contribution by national organizations such as Government, KAERI, Korea RI Association, etc, activated by the Korean Society of Nuclear Medicine Technologist, dedication by related industrial companies and introduction and expansion of PET/CT technology.Now it is time to seriously consider the answer for two fundamental questions: 1. Is it essential health technology? 2. Is it self‐survivable or self‐sustainable? It is important to recognize and emphasize the new driving Forces of our role in promoting and strengthening Nuclear medicine community, based on vision, innovative changes and networks, which are most important essentiality for global leadership.The leadership program should be held as a very important essential function to encourage all members to be real powerful leaders in Nuclear medicine community. We need powerful leaders and experienced advisory groups to provide strategic directions and proper guidance. It is also essential to build multiple teams to expand and activate human network, institutional network, international network, industrial network and strategic or political partnership network.The collaborative leadership through with national and international organizations will offer a scheme of global synergy to the overall growth and development of Nuclear medicine. It can improve global communication will encourage constant progress, ultimately increasing harmony and success and strengthening Nuclear medicine community.