清代以来,盟旗制度一直是蒙古地区最基本的社会政治制度。进入20世纪以后,随着设省设县数量的增加,内蒙古盟旗所辖区域日渐缩小,王公的统治也趋于衰落,盟旗制度开始发生了一些变化。1931年至1945年日本占领时期,内蒙古的盟旗制度变化更大。这一时期的变化在蒙古社会政治制度的近代化过程中占有极重要的地位。由于当时内蒙古地区分别属于 Since the Qing Dynasty, the flag system has been the most basic social and political system in Mongolia. Since the twentieth century, with the increase of the number of counties in the province, the jurisdiction of the Inner Mongolia Autonomous Region has been gradually reduced and the dominance of the princes has tended to decline. Some changes have taken place in the federal flag system. During the Japanese occupation from 1931 to 1945, Inner Mongolia’s league flag system changed even more. The changes in this period played an extremely important role in the modernization of Mongolian social and political system. At that time, Inner Mongolia were belonged to