【Objective】 To investigate the level and the distribution characteristics of intelligence development of children aged from 4 to 7 years old in Jiangsu Province by the means of intelligence screening and analysis of data. 【Methods】 The development quotient (DQ) and mental index (MI) of children aged below 6 years old were detected with development screening test (DST) of children aged from 0 to 6 years old which established by Pediatric Hospital Affiliated to Fudan University to detect the social adaptability,intelligence,and exercise ability of these children.And the social viability of children over 6 years old was evaluated by the social viability scale for infant and students at junior school. 【Results】 Among 8 439 children below 6 years old,there were 7 704 (91.3%) with normal DQ,152 (1.8%) with abnormal DQ,and 583 (6.9%) between normal and abnormal DQ.But for MI,the normal accounted for 89.3% (n=7 583),the abnormal for 3.1% (n=265),and the others between normal and abnormal for 7.0% (n=591).For these children,there was no significant difference of DQ and MI between boys and girls.In total,10 748 children over 6 years old were investigated the social viability.There was no significant difference between different age groups,but the social viability of girls was significantly higher than that of boys.In addition,the levels of DQ,MI and social viability were closely related to region distribution,such as urban or rural,southern,central or northern in Jiangsu province. 【Conclusion】 The intervention of children's development in the rural and the northern of Jiangsu province should be enhanced.