This study analyzed the characteristics of the change in image and spatial composition considering the psychological response of actual users as the spatial composition of the cathedral building has been changing. The existing religious architecture were centered on prehistoric spaces, but due to changes in the lifestyle of modern people and the composition of the space needed psychologically, requirements reduced and efficiently reflected the problems and trial and error that architects may encounter in the process of planning the church's Therefore, it aims to provide basic knowledge of future cathedral plans. The old cathedrals were remodeled and changed from their original appearance, and the space composition and size were investigated around the floor plan for the cathedral's buildings designed to date since the 1980s when it was relatively easy to preserve and digital data. The historical changes and spatial classification of cathedral architecture are to be considered theoretically through existing research papers. The Catholic Church in Korea brought about a change in the historical space as a place of precedent for religion was set up along with various artistic expressions that occurred in religious ceremonies. And these are fully implemented in cultural spaces such as the missionary, educational, and residential spaces in churches.
The space for these religious ceremonies exists in any form in any religion, and this was influenced by the Second Vatican Council. Therefore, the analysis of the change in the size of the Daejeon Diocese, which was designed after the 1980s, analyzed the changes in the number of floors, land area, building area, floor area, floor area, and floor space, divided into precedent, education, social, office, mission, and public space. In this study, quantitative data analysis on spatial composition and scale was limited in qualitative analysis such as drawing analysis, interviews and surveys of users, but the analysis showed that church improvement plans needed to be changed. Therefore, it is hoped that this study will be used as a basic data of cathedral architecture that reflects the needs of modern people in the composition of cathedral spaces in the future.