Pseudohistory in Korea originated in the colonial era. Turanism was an ideology introduced into Korea in the era. Influenced by it, Choy Dong published _The Ancient history of Korean Peoples(조선상고민족사)_ in 1966. It is common practice to stimulate a nationalism by capitalizing on a mythology in the initial stage of a modern nation. Turanism was an ideology manipulated for nationalism as well. Turanism was propagated to colonial Joseon by Japanese army colonel Kaneko Teiichi. Turanism was an ideological base of the ‘Pan-Asiatic Society’. During the colonial era, Joseon was subordinate to Japan, the main agent. The perspective shifted when Korea had been liberated; Japan is located in the position being subordinate to the main agent Korea. Choy was in a pro-Japanese group. Moon Jeong-chang, also in the group, was greatly influenced by Choy. Moon criticized that Korean historical academia imitate the approach that Japanese historians of Japanese Empire had formulated. The criticism was chiefly concentrated on Lee Byung-do, most famous historian at the period. The content of it was predominantly inaccurate and construed maliciously. An Ho-sang, served as the first minister of education of Korea, was one of the public figures influenced by Moon. An and Moon organized ‘Finding National History Counsil(국사찾기협의회)’ and utilized a monthly journal _Ja-yu_ as an organ. They persistently had capitalized _Ja-yu_ on criticizing that Korean historians are deferring to the historiography of colonialism, a Japanese imperial view of the history. In 1974, ‘the national history textbook(국정 국사 교과서)’ was published. Pseudohistorians reprehended it intensely. They assumed that they could indoctrinate general citizens if ‘the national history textbook’ is stated in their opinion. Their opinion corresponded with a nationalistic president Park Chung-hee regime. Some of the books published from ROK army headquarters had included a pseudohistorical view as well. In consequence of continuous activities of pseudohistorians, general citizens have a misapprehension of them having succeeded a national history of the colonial era. Korean historians have to eliminate this misapprehension. Breaking a ‘Korean historical academia＝ historiography of colonialism’ formula, a frame invented by pseudohistorians, would be its first step.