Objectives : To assess comparatively the perceptions of Public Health Center (PHC) staffs for the National Expanded Programme on Immunization (NEPI) according to the provision method in 2005 (the participation of private medical facilities) and 2006 (the enhancement of vaccination services of public health centers) Demonstration Project in Korea. Methods : A questionnaire survey was conducted for 344 and 51 PHC staffs in Daegu metropolitan city and Gunpo city in 2005 (a response rate of 79.1%, 84.3%, respectively). Also, we sampled 90, 70, and 56 PHC staffs in Gangneung city, Yangsan city, and Yeongi-gun, respectively in 2006 (a response rate of 50.0%, 100%, and 100%, re- spectively). We analyzed these data set using descriptive analysis and χ2-test through SPSS for Windows (12.0). Results : The perceptions and performance rates (including the improvement of the immunization coverage rate, the control of under-immunised or incompletely immunised groups in a community, etc.) of the PHC staffs for the Demonstration Project of Daegu metropolitan city and Gunpo city in 2005 were significantly higher than the rates of the PHC staffs in 2006 Demonstration Project regions. However, the PHC staffs in Gangneung city, Yangsan city, and Yeongi-gun in 2006 answered significantly higher rates about the satisfaction and achievement categories on this project than those in the 2005 Demonstration Project regions. Conclusions: We show that there is significant gaps in the perceptions and satisfaction of PHC staffs between the provision method of two Demonstration Project areas and periods. In the near future, the central government must facilitate the feedback mechanism for the acceptance of PHC staffs' opinion in the process of implementation and evaluation of the NEPI.