Abstract: Objective The present investigation was made to know the rate of AIDS knowledge and high risk behaviors of female servers working in bathrooms and beauty parlors．Methods A one-to-one questionnaire interview was administered and the data acquired were analyzed using the statistical software，Epi Info．Results Of 169 unlicensed prostitutes interviewed，those who were clear about the 3 transmission routes of AIDS accounted for 7.69％．And there were 15.98 of the interviewees who knew that the disease was not transmitted by mosquito bites，handshake，sharing instruments of labor and having meals together．None of the interviewed could correctly answer all the questions related to the knowledge of AIDS prevention and treatment．The main channels for them to get informed of knowledge about AIDS prevention and treatment were TV，friends，newspapers and magazines in turn．The routes through which they would like to acquire the knowledge were TV，doctors，newspapers and magazines in order．54.44％ of the interviewees expressed that they were unwilling to come into contact with HIV infected and AIDS patients．It was found in the investigation of high-risk behaviors that those who used condom in the latest sexual contact with a whoremonger accounted for 46.15％，with no use of condom constituting 16.57％．No use of condom in sexual contacts in the previous 3 months was found in 2.37％ of the subjects with occasional use of it in 26.63％ of them and use in every time of intercourse in 27.81％ of them．There were two persons (1.18％) who used narcotic drugs within one year but did not share needles．Conclusion Females as servers in bathrooms and beauty parlors know about AIDS with different degrees but don't have comprehensive knowledge．TV is the channel they like best to promote the knowledge．Currently，