After graduating from Daejeon Middle School, he entered the Hermitage of Mount Kumgang and studied for 2 years, but gave up halfway and returned to his hometown.

In August 1945, his old rank transferred to the newly formed Police Administration Department(the precursor to the National Police Agency), and immediately after the restoration of the equivalent of his old rank, he decided to continue his career there, and so he visited and consulted Choi Kyung-rok, a member of the 4th Battalion of the former Japanese Korean Army, before entering the Military Language School.

He returned home in August 1954, was promoted to lieutenant general in October of that same year, then again reappointed as the head of the 8th Mechanized Infantry Division, then made head of the 3rd Corps, and later in July 1956 he again traveled to the United States, where he conducted 1 month of local inspections and returned home in August.

He also served as the Martial Law Commander in the Seoul area in March 1960, and when the demonstrations of student protesters protesting the March 1960 South Korean presidential election results escalated to the April Revolution, he visited Gyeonggi Province on April 20, 1960, at the call of President Syngman Rhee, to plan a redress of the situation.

During the April Revolution, he met with student demonstrators protesting the March 1960 South Korean presidential election in Seoul, and suppressed the uprising.

Later, he disclosed the military's intention to neutralize the media, acted passively in the suppression, and focused on preventing bloodshed, maintaining policing, and rectifying chaos.

[6] In the wake of the 1962 stock market crash wave, after a conflict with the Supreme Council for National Reconstruction, on 10 June 1962 he resigned from his posts of Prime Minister of South Korea and Minister of Economic Planning on 17 June in opposition to monetary reform, and joined the opposition movement and formed a political party.

He resigned from the posts of Prime Minister, and Director of the Economic Planning Board, and then he urged the military government to transfer power back to civilian politicians and return to the military after the redress of the situation due to the revolutionary pledge, and after receiving criticism from Kim Hyun-chul, he fought back against these accusations.

An open letter was published to the chairman of the Supreme Council for National Reconstruction, Park Chung Hee, and at 11:30 pm on August 11, he was with his family at his home in Sindang-dong, and was suddenly arrested on suspicion of murdering a teacher by an agent of the Korean Central Intelligence Agency.

According to the arrest warrant issued by Judge Won Jong-baek of the Seoul Criminal District Court, enforced by the Korean Central Intelligence Agency on the morning of August 11, 1953.

An arrest warrant was issued for the reason that he ordered the demonstration team to fire in front of the house (during the incident that was not confirmed at all and was not even prosecuted at the revolutionary trial immediately after the April Revolution).

It is difficult to reveal the murderous intentions against the lieutenant colonel, and even if the charges are confirmed, the circumstances will be taken into account in consideration of the latter.”[9] After winning the trial, he then served as the President of Incheon's Dongkuk Steel Mill.

In 1966, he also participated in an interview with people filming a documentary called "The State of the Facts", which described the lives of past opposition politicians.

On August 20, 1980, he moved to the United States and was admitted to Loyola University Hospital in Chicago, but fell into a coma within three days.