The purpose of this study is to seek an effective support system to the child care centers by investigating how the institutional accreditation is supportive of the teachers when considering teachers’ ecological differences including their education, teaching experiences, knowledge and skills, and the characteristics of their institute. This study surveyed the teachers who worked in the accredited institute in the past, and have been working in the child care centers that are in the process of accreditation regarding the difference of their professional development levels in each of the factors, the supporters’ attitude that they request, and the change of their attitudes after the accreditation support. Results showed that the supporter's attitude was not statistically meaningful in teachers’ professional developmental levels. However, many of the teachers wanted the supporters' attitude, particularly emotional support. In addition, the study showed that the supporters’ attitude was positively effective of the teachers' passion and confidence. It implies that the child care center accreditation with appropriate supports is of great assistance to the improvement of a quality child care center and the teacher professionals as well.