This article assumed I Hanja's book based on the view of historical geography for discussing different issues and its impacts of the boundary of China and Korea in Ming Qing dynasty. It positively assessed the book’s research methodologies. Also, it appreciated her effort for finding the primary sources and got use from them. At the same time, the inadequate of the Sino-Korean research was supplied by I’s book. There were some parts can be improved. But it can help the academia to find out more new idea and perspectives for the related topics and the field.