The Eight Banners system existed for 296 years from its formal establishment to 19 1 the collapse of the Qing Dynasty after the Xinhai Revolution. It was an important military pillar for the Qing Dynasty to rule the whole country. It has played a positive and progressive role in the history of China, made important contributions to developing and consolidating a multi-ethnic unified country, defending the frontier and preventing foreign aggression, and played an indelible role in the development of Manchu society. With the evolution of history, the backward side of the Eight Banners system has become increasingly obvious, which has seriously hampered the development of Manchu people and played a less and less role in the campaign. The Eight Banners system is closely related to the fate of the Qing Dynasty, which experienced the whole historical process from prosperity to decline and from decline to death.