The purpose of this study is to analyze the effects of the Health Management Information System (HMIS) on the productivity and adoption process of health center staff as well as the satisfaction with the services provided by the Kwonsun health center located in Suwon city as a study subject. Three surveys were conducted to measure the changes in productivity and adoption process (knowledge, persuasion, decision, implementation, and confirmation) of health center staffs over time. In addition, the effects of HMIS on the level of satisfaction with the services perceived by the visitors were also measured by comparing the satisfaction level between the study health center and a similar health center as a control group. The results suggest that HMIS increased productivity and satisfaction of staffs but did not increase persuasion and decision level, and that it succeeded in increasing the satisfaction with the services for the visitors.