In this paper, we proposed a method to quantify and classify the components constituting spatial environment and to simulate the effect of each component to improving spatial environment. For this purpose, we selected the unique spatial environment of Incheon city as a study site and conducted an impression evaluation survey of students. The relationship between each component and their impression was analyzed quantitatively by using the quantification theory Ⅲ and cluster analysis, which was used to simulate the effect of improving spatial environment. As a result, we identified the influence of each component on the evaluation of spatial environment as well as the overall improvement effect of spatial environment.