The purpose of this study is to identify the moderating effect of Internet lifestyle among relational benefits effect, customer satisfaction and customer loyalty on the Internet shopping mall. For the study, utilizing the convenient sampling method, the sample of study was composed of female and male adults aged between 20 and 30 living in Seoul metropolitan area who had experienced purchase of fashion products on the web. Of 350 distributed, 311 useful questionnaires were returned. The survey research design was employed with structured questionnaire. For data analysis, descriptive statistics, factor analysis, reliability analysis, cluster analysis and multiple-regression analysis were used. The results of this study are as follows: The results of Internet lifestyle were regarding 4 cluster of Internet lifestyle. 1) information seeking type, 2) shopping maniac type, 3) social gathering type and 4) passive follower type were obtained. The interaction of psychological benefits and the type of Internet lifestyle affected customer satisfaction positively. The interaction of customer satisfaction and Internet lifestyle reinforced customer loyalty. Especially interaction of shopping maniac type among Internet lifestyle types and customer satisfaction affected customer loyalty strongly.