The investigation is about the gender inequality, sexism and feminism between girl and boy. Form this survey, at the age of 10-12, girl are starting to feel the different treatment because of the diverse of sex. Though this survey, over 50% girl who is 10 and 15 years old, these inequality are more manifested in sports and the internet.in this investigation ,1/3 of girls did not want to share about their experience of unfair gender treatment. However, only when we realize the existence of this problem of gender inequality, we will be able to deal with this problem.