The purpose of this study is to reveal the process of enactment and revision, the contents of the police uniform system by the Government-General of Joseon, and to examine the relationship be-tween the uniform system and the ruling policies of Imperialist Japan. The research methodology in-volved document research of official gazettes that published legislation on the police uniform system. Political background was referenced from various preceding studies. The research results are as follows. The Japanese invasion of Korea, in regards to the police, appeared as infiltrations through the three routes of consular police, temporary military police, and inside the Korean police. Each or-ganization had different uniform systems, and after the installation of the Japanese police in 1907, the uniform system of high level officers of the Korea police was changed to the Japanese-style. After the installation of the Government-General of Joseon in 1910, a police uniform system was not enact-ed until 1918, with the exception being made for police officers due to the military police system. The ‘Police Officer Uniform System of the Government-General of Joseon’ enacted in 1918 stood out for its golden insignia on solidly colored fabric, which effectively indicated rank, as well as the Japanese flag pattern and the cherry blossom pattern, which symbolized imperialist Japan, on the cap badge and insignia. The 1918 uniform system had many differences from the Japanese system of the time in terms of design, perhaps due to the political autonomy of the governor-general. The 1918 uniform system was completely revised in 1932. This uniform system was modified in various ways. The system was almost identical to the Japanese system at that time. This is the result of Japan’s in-tent to dominate Korea, which involved assimilating Korea into Japan with the purpose of conducting a full-fledged invasion of the continent after the Manchurian Incident.Key words: regulations of police uniforms( ), the Government-General of Joseon( ), the ruling policies of Imperialist Japan( ), uniforms()