Narcissism is the psychological state of focusing attention on self

loving and accepting self unconditionally.This paper reviewed the formation of definition and theories

including depth psychology

object relation theory

self psychology

social cognitive theory

evolutionary psychology

etc.There are two structures about narcissism:two-form theory

continuum theory.The assessment of narcissism was introduced

and the antecedent variables and the consequence variables were discussed.At last the research on narcissim in the cultural background of China is predicted.