This paper aims at the analyses of Chinese Strategic Support Force(SSF), its cyber capabilities. And this research plans to offer significant implications for Korean security. Cyber operation of China has been well known its vivid activities. In 2015, Chinese military has established the Strategic Support Force, including Network System Department for cyber operation. In this paper, the authors analyze mission, organization and capabilities of the Network System Department. The primary missions of the force are for strategic information support and implementing information operation. On the viewpoints of cyber operation, establishing SSF has contributed to facilitate the effectiveness of the cyber operation, Further, the authors argue that it has significant influences on Korean military as well as the U.S. Forces in Korea, directly and indirectly.