Cross-sectional survey from September to December 2009, the object are the ethnic minority women 15-49 years old, in the area of 4 provinces: Cao Bang, Son La, Lai Chau and Yen Bai, to describe behavior and practice about HIV/AIDS of the ethnic minority women 15-49 years old in these provinces, from that point to propose the interventional, preventive models or appropriate measures. The results are 1520 people who were interviewed. The highest rate are women aged from 20 to 29 (38,9 percent) and from 30 to 39 years (31,6 percent). On education level: university/college 4,7 percent, secondary education 25.2 percent, secondary basis 42,2 percent, primary 21,2 percent and illiterate are 6,7 percent. More than 93.0 percent of ethnic minority women can read fluently the popular language. Only 20,8 percent - 26,4 percent of ethnic minority women 15-49 years old in 4 provinces answered that they have a positive attitude to people with HIV, include: accept buying food from vendors with HIV/AIDS, no keep secret about the HIV status of family members, ready to take care of family members who infected with HIV at home and allow a female teacher with HIV but healthy can teach. Still also very high rate of ethnic minority women in 4 provinces think that HIVinfected persons should be ashamed of themselves (40,9 percent) and 43,3 percent of them believe that people with HIV are the causes of disease in the community, people suspected of carrying HIV infection (17.7 percent), 59.6 percent of the suspected or HIV-infected people be teased and shunned.