边镇设置问题是明史研究的热点之一,“九边”的形成与变迁同时亦是明代边防制度的重要组成部分。其中,各边镇中职官的设置、官员的权力范围变化、相互制约与监督等问题便极为重要,而对各边镇巡抚设置问题的研究又是其中不可忽视的领域之一。明代废除了元代的行省制度,而仿效宋代监司分路而治的办法,建立了都指挥使司、布政使司与按察使司分立的制度。但是三司 The issue of border town setting is one of the hot spots in the history of Ming Dynasty. The formation and change of the “nine edges and corners” are also an important part of the frontier defense system in the Ming Dynasty. Among them, the setting of officials in each side town, changes in the scope of authority of officials, mutual restraint and supervision and other issues will be extremely important, and the study of the setting of governors in each town is one of the areas that can not be ignored. The Ming Dynasty abolished the provincial system of the Yuan Dynasty, and follow the example of the Song Dynasty supervise and control division, established the system of commanding and divisions, the Chief Minister and the divisions. But three divisions