This study applies the cognitive-affective-conative loyalty framework of Oliver (1997; 1999) and regards the economic ability of family as moderating variable. At the same time, the customers of school lunch are divided into Type 1 and Type 2 by the economic ability of family. This purpose examines the relationships among lunch qualities, customer satisfactions, and customer loyalty. It also examines the moderating effects of moderating variables to the loyalty framework. To reach the purposes, this study has collected samples from every county of Taiwan region by a quota sampling, and the data is examined by SEM. The results confirm a significant positive relationship among lunch qualities, customer satisfactions, and customer loyalty. They also reach a non-significant level in the critical ratio for difference between parameters of types. These empirical results can be used to construct a good long term relationship between a provider of school lunch of the private management of public school and customers. These results also help the educational authority to deal with school lunch administrations.