As the service market is increasingly competitive, internal marketing, marketing orientation, and customer satisfaction are becoming a crucial issue to the survival and growth of the service firms. This Study examined the structure modeling of internal marketing, market orientation, and customer satisfaction to verify the relationship among construct variables. Conslusively, the higher degree of internal marketing and market orientation, the higher degree of customer satisfaction. Specifically, The positive impact of internal marketing, customer orientation and competitor orientation on customer satisfaction is verified respectively. But, the impact of interfunctional coordination on customer satisfaction is rejected. The company is required to intensify interfunctional coordination in company operation process to boost sustainable competative advantage.