Like all business activities nowadays, the industry of auto-service is very competitive. From Quick Service chain auto shops to the brand-name auto service departments, they all have to work hard to make difference from its competitors. They hope to gain acceptance of customers and turn that into loyalty. In addition to improving the service facility, recently the auto dealer has paid more attention on the staffs to see if an individual stuff fitted their job environment. The most important object is what customers care most when they need auto service? This study investigates the service department staffs of an European auto company. Base on the theory of vocational choice of Holland, it discussed the relationship between the personality and vocational environment of staffs. At the same time, we also have 119 customers questionnaires to try to understand the composition of customer satisfaction. This part is analyzed based on the PZB SERVQUAL theory. The study shows that most employee's personality belongs to "Labor". The result does not only in accord with the vocational environment theory, but also with the Holland's theory. According to the questionnaires we collected from auto service customers, there are three main composes for customer satisfaction. We named three main composes as " Promise and Care", " Professional Service" and "Tangibility". To conclude, dealers enhancing the level of "promise and care" and "professional service" will improve the customer satisfaction.