The purpose of this paper is to research under the interest in intellectual history how Juche ideology has undergone trials in the historical process of North Korean socialism, what ideological features it revealed in that process, rather than to focus on theoretical contents of Juche ideology. First, after researching theoretical phase shift of Juche ideology in historical context, I analyzed the cause of the phase shift in three aspects. Juche ideology has been changed in terms of the theoretical phase and emphasis of contents, because of the need for power to respond internal -external environmental change. On a large scale, for the cause of the phase shift, requirement for establishment of the unique ideology system, North Korean leader's awareness about the advent of a new era, and North Korean leader's pride on a unique line of socialist construction enabling the economic growth of more than 20 years after the war, can be exemplified. Secondly, I analyzed the ideological features shown in the historical change process of Juche ideology. North Korean leader's strong post-colonial aspirations was the power made to replace the Marx -Leninism with Juche ideology, and the Confucian tradition contained in it was the 'invention of tradition' which was utilized selectively to establish the political leadership and promote the socialist industrialization. Further, Juche ideology, in its historical development process, has developed into the religious dimension that was deeply internalized in the lives of North Koreans, beyond ruling ideology.