In the context of promoting the modernization of national security system and capabilities， and of resolutely maintaining national security and social stability， the construction of national security discipline can provide intellectual and theoretical support for the practice of safeguarding national security. At present， it is widely recognized in academic community that professor Liu Yuejin， as an important leader in China's national security studies， has made significant contributions to the birth， development， and construction of China's national security discipline， whose academic exploration into the discipline is not only systematic but also constantly evolving. Liu Yuejin's National Security Collection serves as a phased academic summary in the fields of both national security basic theory and national security discipline. By studying the Collection， one can systematically grasp his national security ideology.