Despite the fact that the leisure time for the youths is increasing, most youths are quiet and doing their personal activity, so they are not comparatively spending much time actively. There needs to be a societal system and supporting space where the youths can participate in various activities such as in culture or sports after weekday lessons or during the weekends. As an off-campus and social educational institution, Children's Palace is of great significance in nurturing people, creating social benefits and improving talent performance in socialist countries. It is becoming more and more influential in many cities across the country due to the increasing focus on public quality education of the next generation. However, research into the designing of Children's Palace construction is quite limited. The purpose of this study is to comparatively analyze the youth center in Korea and children's palace in China for spatial composition characteristics. It is hoped that the study will serve as an effective beacon for those who devise Children's Palace for the youths, contribute to improving qualitatively the life quality of the youths and correspond with the true welfare for the youths in society.