Abstract: With the rapid development of Social Networking, it has become a mode of social interaction. A lot of internet users including adolescents use social services provided by internet. It’s helpful for educators to clarify the happenings in the adolescents’ using social service of internet, effectively guide adolescents to take advantage of Social Networking. This study explores the relationships of extraversion, neuroticism, social support, social anxiety, and the use of internet social services by surveying a sample of 339 adolescents through questionnaires. The results shows that (1)there are influences of gender and grade on the use of Social Networking; (2) extraversion and neuroticism have direct and positive effects on the use of Social Networking; (3) extraversion has an indirect influence on the use of Social Networking through social support; (4) extraversion has negative effects on social anxiety and it also influences the use of Social Networking through social anxiety; (5) neuroticism has an direct effect on the use of Social Networking through social anxiety.

Key words: adolescents, social service of internet, personality, social support, chatting online