This research was composed over a period of 10 times and was performed to be conducted in an environmental education class for 4 months from September to December of 2008 by selecting 32 experimental group students and 32 control group students from OO Middle School in the Busan area. An environmental education program utilizing IIM(independent investigation method) was composed by selecting a theme for environmental education among the environmental curriculum in middle schools. The results of analyzing the effects which influence environmental sensitivity and environment-friendly behaviors after applying the environmental education program utilizing IIM are as follows. First, it was revealed that the environmental education program utilizing IIM is more effective among experimental group students than control group students in regards to environment-friendly sensitivity. Second, it was revealed that the environmental education program utilizing IIM is more effective among experimental group students than control group students in regards to environment-friendly behaviors. Third, it was seen that even students responded very favorably toward environmental education program utilizing IIM.