Child sexual abuse has become a serious social concern due to the recent report of its higher incidence rate than commonly believed. This form of child abuse has been proposed to bring about adverse effects on children's development since more than one century ago. However, research over past decades reveals that effects of sexual abuse are extremely complex and diverse. Particularly, there appear to be many unclear factors increasing the probability for the development of psychiatric disorders in sexually abused children. The present paper investigated how child sexual abuse creates diversity over the course of the victims' development from multiple perspectives. Then it attempted to find developmentally appropriate interventions for victims existing particular psychiatric symptoms.