In order to understand customers' characteristics, banking management should create a good relationship with them. The goal of this research is evaluation of effect electronic banking and three dimensions comprise quality of system, quality of information and quality of servicein customer loyalty with regard to role of customer satisfaction among customers of mellat bank in Isfahan city in Iran. The population of the study comprises customers of mellat bank in Isfahan city that use of total electronic banking service, therefore the population of research is unlimited and uncounted. The instrument of data collection in this research is standard questionnaire. Number of 250 questionnaire distributed and totally 224 questionnaires were analyzed. Samples were also selected with method of available random. To analyze data and test hypotheses was used pls and Spss software. The results indicate that system quality has a positive and significant impact in customer satisfaction. On the other, results indicate that information quality has a positive and significant impact in customer satisfaction. Also, the effect of customer satisfaction in customer loyalty is confirmed.