This paper examined the adoption and the uses of social network site (SNS) namely Facebook in South Korea. The aim of the study is to explore the factors contributing to the adoption and the uses of social network. The paper uses both qualitative and quantitative approaches for research methodology. The qualitative method is used to gain insight into how consumers value social network by interviewing both users and non-users. Thirty-five questions were developed in the questionnaire based on the interview.Factor Analysis suggested nine characteristics of the adoption, namely involvement, usefulness, usage, trust, convenience, openness of information, audience, making contacts, and acceptability. A MANOVA test showed that there were significant difference on the attributes of the adoption by gender and ages. ANOVA showed that males and females differed on their attitudes toward five attributes of the adoption: involvement, usefulness, usage, openness of information, and audience. It also showed that different ages of people differed on their attitudes toward five attributes of the adoption: involvement, usefulness, usage, convenience, and openness of information. The paper indicated that Korean consumers get involved, perceive usefulness, use, and accept social network as a part of their life styles. Marketing managers should be aware of the opportunities to utilize the usefulness of social network, which may provide an avenue for companies to reach their customers more effectively.