Objective: The objective of this study was to develop and apply a Teacher Learning Community Program in order to improve the specialization of infant daycare center teachers and explore the changes in the learning attitudes of teachers. Methods: To develop the program, the requirements were analyzed by surveying 500 teachers of infant classes. The developed program was provided to 25 infant daycare center teachers for a total of 14 sessions. A total of 75 sets of collected journal writing materials were analyzed qualitatively. Results: First, the Teacher Learning Community Program for infant daycare center teachers was developed. Second, the Teacher Learning Community Program was found to bring a shift in the learning attitudes among the teachers of infant classes towards reflective and communal learning. Conclusion/Implications: The Teacher Learning Community Program brought a shift in the learning attitude towards reflective and communal learning. Thus, the Teacher Learning Community Program can be applied as a teacher education program for improvement of the specialization of infant daycare center teachers.