In order to support teachers preparing their teaching resources, a teaching ecosystem for developing an online service system to acquire teaching materials, the Ministry of Education (MOE) in Taiwan, implemented an Integrated Course Service System (ICSS) to assist teachers in searching for instructional resources from distributed Educational Six Learning Networks (ESLN) of MOE. The study designed the ICSS and developed an instrument to investigate the satisfaction for the teachers of primary schools, junior high schools and senior high schools. By analyzing 253 teachers, the results show that demographics, such as age, school level, teaching experience and position, have significant effects on the ICSS satisfaction. Further, the teachers were found to be satisfied with the system content, system accuracy, report format, ease of use, system timeliness and community building offered by the ICSS that helps us to understand the teachers' online behavior in more detail for the popularization of the course service system.