Few topics arouse more attention of people than sex and sex crimes. It is important that how to define sexual assault or sexual offense. It is genital-to-genital contact or oral-genital contact? Dose it involve the disrobing of a victim or offender? Dose force have to be involved? Dose some type of physical injury have to be involved? Sexual assault can take many forms. It involves crimes such as rape, incest, acquaintance rape, sexual harassment, or just about any other type of unwelcome sexual advancement. When we start focusing on the real consequence felt by the victims inthe more serious types of assault, our attitude becomes much more somber. It is from this perspective that this paper is witten. while many criminologists and policy analysts in the field are content to talk about the crime rate in terms, this paper is not. It is only when society, agencies, and actors within the criminal justice system begin to truly understand the full etiology of these offenses. Base on the above ideas, this paper deals with the legal system about victim. Then, discussing how to protect victim from second harm and from the view of comparative law perspective to understand Taiwan and Japan's Crime Victim Protection Act.