Abstract: Based on practical sighnificance of sex talk online,this qualitative study of the BBS layout of a liberal arts university in Beijing shows:(1) Internet has impact on both males and females. They get more sexual information and enhance the ability of reflection of “sex”.(2)In the background of sexual society, males' anger and females' library have to be released through sex talk online.(3) Female sexual activities are influenced by social schedule. Practical significance of the internet presents gender differences,and the social and cultural impact on women's sexual activity is still affected.