In July 1938, in order to promote wartime policy, the Chinese Nationalist Party established the People’s Political Council, which accepted political participation from regional representatives, representatives from overseas Chinese and ethnic minorities, the Chinese Communist Party, various Democratic factions, and representatives from business organizations. Therefore, they tried to build a total war system as much as possible under the conditions of war with Japan. This paper analyzes how the element of popular will expressed by the People’s Political Council influenced China’s wartime administration, within the framework of the tripartite relationship between the Supreme Council of National Defense as the highest policy-making agency and the Executive Yuan as the policy enforcement agency. In conclusion, it was found that the People’s Political Council was not an advisory agency that could not constrain the administration of the Kuomintang government at all, and that a weak balance of power existed between the People’s Political Council, the Supreme Council of National Defense, and the Executive Yuan.