Objective To discuss the temperament characteristic of the baby,and provide the basis for early intervention.Method Temperament test and analysis on 344 babies of nine months old were made by "revised edition of the baby temperament questionnaire "in Hongkou district Shanghai.Results The baby temperament types were dominated by easy-raised type and the middle type.There were no significant differences on infant temperament type in terms of gender.In terms of temperament dimensions of the baby boy and baby girl,there were differences on dimension one-level of activity,while there were no significant differences on the remaining dimensions.There were no significant differences on the distribution of temperament types of Shanghai household and non household registration babies.In terms of temperament dimensions,there were differences on dimension two-rhythm characteristic,while there were no significant differences among the remaining dimensions.Conclusions The baby temperament types are dominated by easy-raised type and the middle type while they are different from each other.It can provide evidence for the early interference on temperament if the temperament characteristics of children were known as early as possible.