This paper discusses the depression syndrome with various forms,including single depression syndrome as well as the coexistence of diseases and depression syndrome,diseases induced by depression syndrome and depression syndrome induced by diseases,dominant depression syndrome and recessive depression syndrome,restricted depression syndrome and general depression syndrome. Single depression syndrome is a kind of emotional diseases with disorder of function. The coexistence of diseases and depression syndrome which means there are depression paralleling organic diseases and TCM diseases,and it can be divided into two parts,that is diseases induced by depression syndrome and depression syndrome induced by diseases. Dominant depression syndrome is induced by the seven outside emotions,which can be differentiated easily in clinics. Recessive depression syndrome is induced by the seven inside emotions in clinics,and the patients might be also specially gifted in the field of recessive depression syndrome. Restricted depression syndrome is a simple dominant depression syndrome induced by bad emotions and stagnation of qi,such as hysteria,lily disease,globus hystericus,and insomnia. General depression syndrome includes the coexistence of diseases and depression syndrome,depression syndrome induced by diseases,recessive depression syndrome,and all of the diseases related by bad emotions. Discussing the morphology of depression syndrome aims to meet the needs of TCM clinical diagnosis and treatment better.