Eating disorder (ED) is one set of mental illnesses distinguished by aberrant eating patterns. According to the DSM, they are categorized into Four Edition, revised (DSM-IV): anorexia nervosa (AN), binge eating disorder (BED), bulimia nervosa (BN), and an atypical eating disorder(ED). Biological factors, psychological issues, social factors, and family influences are all categorized as causes or risks of BN, AN, and BED. From a biological, psychological, and social standpoint, the etiologies of these three types of ED are inextricably intertwined. In terms of biological parameters, all three have a significant heritability and are attached to dopamine and 5-HT release. Both AN and BN people show different manifestations of epigenetic processes. The value of slimness and the promotion of a slender figure culture in society supply may refer to the prevalence of AN, BN, and BED. As a result, the significance of the three forms of ED must be seriously considered. More concern needs to be given to the effect of culture on these three typical ED. Multiple treatments for these three ED also need to be further investigated. Overall, there is still much to learn about this eating condition.