Abstract: Based on previous research,this study aimed at checking(1)which is the primary factor when category concept,color,shape and theme relation exit in children's classifying operation simultaneously.(2)order and different levels among four classifying standards.150 objects were adopted,age range was from 4 to 8 years of age.We selected 7 category concepts that the children knew well,using concept matching method and matched pair technique.The results showed:(1)Category concept ability developed fast after 5-years of age,reaching the basic mastering level at 8-years of age.(2) Perceptual factor was the last turn among four classfying standards,theme relation was placed at the top at 5-years of age.(3) Order of the four standards were stable and consistant after 6-years of age.(4)Different levels increased with the age growth.(5) 6-7 years of age was the turning point of different levels of changes.

Key words: children, develop, competition, different level, classifying standard