This study was conducted in order to understand the effects of group art therapy on the release of psychological or physical stress for university students according to color(light) environment of art therapy space. The color(light) environment of art therapy space was changed by using LED lightings which have different correlated color temperatures(CCT) of 6500K or 2900K. The results showed that the group art therapy, conducted under the color(light) environment having CCT of 6500K as well as 2900K, reduced the stress of the university students. Furthermore, the group art therapy, conducted under the color(light)environment having CCT of 6500K, released the psychological stress of university students effectively,meanwhile it could reduce the average value of the physical stress though it was not statistically meaningful. However, the group art therapy, conducted under the color(light) environment having CCT of 2900K, effectively released the physical stress of university students, meanwhile it could reduce the average value of the psychological stress though it was not statistically meaningful. These results can be attributed to that the color(light) environment having CCT of 6500K may cause \'psychology with introverted tendency\',meanwhile color(light) environment having CCT of 2900K may cause \'psychology with extroverted tendency\'.