This study aims to investigate: (1) whether the public's media exposure to the AIDS and other factors have an impact on their knowledge, beliefs and behavioral intentions, as well as the mechanism of behavioral change. (2) how the public reacted to the process of the media campaign. The study was conducted with a telephone survey implemented from April to May, 1996. A sample of 1,111 residents over the age of 18 in the Greater Taipei area, including Taipei City, Taipei County and Keelung City, was drawn. Based on the survey findings, more than 80% of the respondents knew about the accurate routes of AIDS transmission. Nevertheless, there were still 30~70% of them thought some inaccurate routes could lead to AIDS transmission as well. Television including news and PSAs was the major medium of respondents' reported source of AIDS information. People with more sources of AIDS information were more knowledgeable about it. Half of the respondents intended to use the condom next year in sexual conducts. The results indicated that the more AIDS information sources the respondents had the more he/she would feel the severity of contracting AIDS and the benefit of taking preventive behaviors as well as higher level of self-efficacy in avoiding the dangerous situations. However, the influential psychosocial variables in taking preventive behavior was the perceived barrier and self-efficacy in persuading their partners to use the condom. The materials of the campaign were not properly tailored to fit the purposes.