Immediately after the liberation of August 15, he was appointed to the permanent committee of the Korea University, but he was transformed into a politician, head of the Planning Committee of the Korea National Preparatory Committee, and the Central People's Committee of Korea. Formed in February 1946, he served as the chief of propaganda and deputy director of the Democratic Front for the Reunification of Korea, as a standing committee member, as a researcher for land agriculture issues, and as a food researcher. On the other hand, in October 1946, the "Journal of the Korean Land Issue" was published. In this book, the paper on the previous land survey project was published in Japanese during the Japanese occupation period.