Abstract:OBJECTIVE To evaluate the development of preschool children's developmental ability by using the age and analysis questionnaires-chinese (ASQ-C). [Methods] 122 children aged 34 to 66 months were collected by using a random stratified sampling method. ASQ-C questionnaires were carried out by parents, and the five energy scores of communication, large movement, fine movement, solve the problem and individual-social were analyzed by professional staff. RESULTS A total of 122 children were investigated, including 65 males and 57 females, accounting for 53.3% and 46.7% respectively. One or more abnormalities were detected in 26 cases, the detection rate was 21.31%. T test showed that the boy scores of communication, large movement, fine movement, solve the problem and individual-socia l were higher than girls, but the difference was not statistically significant (P> 0.05). The ANOVA showed that there was no significant difference in communication, large movement and fine movement scores at all ages (P>0.05). The difference between the problem-solving and the individual-social scores was statistically significant (P<0.05). Comprehensive problem analysis showed that parents are more worried about their children's vision and bad behavior. Questionnaires practical survey analysis showed that parents fill in the ASQ questionnaire although spend more time, but children problems in the growth process have a greater understanding.CONCLUSION The age and development process questionnaire is suitable for preschool children which is simple and practical.