Nowadays a lot of companies have an insight that mobile service becomes major channel to communicate with their customers, due to widely spread mobile devices. Especially, mobile service in financial industry becomes aim of communication channel, caused by changed patterns of customer`s financial service accessibility. So this study tried to investigate factors which have effects to customer`s satisfaction and loyalty, through quality estimation for mobile banking service which is the most frequently used service to customers. Refer to preceding researches, we built factors for quality estimation and designed our study model. We used SPSS 23 and AMOS 23 to make examinations of reliability and propriety of our study model and assumptions, with total 233 answered samples to our question. Analyzed results showed that connectivity, convenience and design had effect to customer`s satisfaction, which had strong effects to their loyalty. But Empathy, fulfillment, enjoyment, responsiveness, personalization and security did not effect to customer`s satisfaction and their loyalty. Therefore, we suggested some guides for development of mobile banking service and direction for further study, based on results of this study.