The Korean academic call the study of Korean history and “Manchurian history” during the Japanese Emperor period “colonialist history”, which is usually characterized by the theory of heteronomy, stagnancy, the theory of Japan's common ancestor, and the “Manchurian view of history”. The Korean academic began to criticize colonial historiography in the 1960s. After the Northeast Frontier Research Fever appeared in China in the early 21st century, the “Man Xian’s View of History” became the focus of the Korean academic. A series of critical studies focused on the “Man Xian’s View of History” of ancient Korean history, Gao Gou Li history, and Bohai history. These studies mainly expose and criticize theories such as “inseparable theory of Manchurian-Korea”, “non China theory of Manchuria and Mongolia”, and “inseparable relationship between Manchuria and Japan”, which are carried out by Japanese scholars like Shirikuki and Inaba Yanji for the needs of the Japanese Empire's invasion and expansion to Korea and China and its colonial rule. There has been another proposal to rethink the problems and limitations in “colonial history research”, and to reconstruct the ancient Korean history system. The key to finding an effective method to solve the East Asian history ownership problem is to avoid equalizing historical problems with contemporary reality, to avoid equalizing territorial problems with history. Historical studies should be considered purely academical and historical facts should be restored by “seeking truth from facts”.