The purpose of this study was to examine the impact of the service characteristics of premium information contents, one of premium Internet contents, on customer satisfaction and customer loyalty, as the premium Internet contents market has attained a rapid growth owing to the nationwide penetration of the Internet and its ease of use. Earlier studies were analyzed to define the service characteristics of premium Internet information contents, and a research model and hypotheses were formulated to find out the influence of the characteristics on customer satisfaction and customer loyalty. After a survey was conducted, the analyzable answer sheets from 359 respondents were analyzed. As a result, four service factors of premium Internet information contents that were reliability, charge, usefulness and convenience were identified as the variables that had a significant impact on customer satisfaction, and the other two factors that were timeliness and diversity exerted no influence on that. And customer satisfaction affected customer loyalty in a significant manner. This study attempted to investigate the influential relationship of the diverse service characteristics of premium Internet information contents on customer satisfaction and customer loyalty to have a good understanding of the attitude and will of consumers who bought the premium information contents, and this study also intended to make a contribution to the improvement of the quality of information contents in an effort to step up the revitalization of the Internet contents market by helping the market attract more loyal customers.