To evaluate the change of perception, attitude and practice toward Group Health Care Systerl for small and medium industries, a survey using self-administered questionnaire was conducted to a part of industries in Inchon area, in year 1992 and 1993. major dependent variables were perception, attitude, and practical behavioral change related with Croup Health Care System ; these variables were measured by 3-point Likert like scale. 47 industries were used in analysis. Psrception of year 1993 was higher (1.25) than that (1 34) of 1992. Attitude of yeal. 1993 was also slightly higher (1.46) than that (1.43) of 1992. Both data indicated positive attitude. Practice of year 1993 was slightly lewer (0.86) tHan that (0.90) of 1992, but its change didn't have any statistical significance. In year 1992, major determinants of perception, attitude and behaviral change were sex and age of industrial health care manager ; they had positive efffct upon perception and practice. In yeal. 1993, it was sex of health care manager; it had influenced upon practice. Both year 1992 and 1993, perception was higher and attitude was more positive. In the case of higher perception or positive attitude, practice was active accordingly. To accelerate the behavioral change of health care manager, it is necessary to eaucate them continuously.