Abstract: Online self-disclosure is the extension of self-disclosure offline in the cyber space. This study put forward integrated definition of online self-disclosure, and classified it with three perspectives: form, degree and expression. Online self-disclosure has both positive and negative influences. The appearing and the development of online self-disclosure are affected by various factors such as social culture, cyber condition, gender, age and individual psychology. Cognitive experiments, deep discussion on the influencing factors, the self-disclosure on new media of Internet, cross-culture study and Special groups’ online self-disclosure may be the orientations for future researches.

Key words: online self-disclosure, integrated definition, cognitive experiment