Based on this,a deep analysis of Piaget s stage theory of cognitive development and perspectives on cognitive development mechanism is conducted:cognitive development is the unification of continuity and discontinuity,is the unification of domain-generality and domain-specificity;the mechanism of cognitive developm.

All the present inductive inference models are domain-general.

Whether language acquisition stands apart from general human cognition or not is what separates domain-specific view from domain-general view of language acquisition,which are respectively founded on Chomsky s "mentalism" and Fodor s "modularity theory", and on Piaget s "developmental cognitive theory".

A debate focuses on the domain specific or domain general procedure people use in the reasoning.

Whether language acquisition stands apart from general human cognition or not is what separates domain-specific view from domain-general view of language acquisition,which are respectively founded on Chomsky s "mentalism" and Fodor s "modularity theory", and on Piaget s "developmental cognitive theory".

It becomes an important tendency in contemporary cognition development research from concerning domain-generality to concerning domain-specificity.

Besides,this paper analysed some factors correlated with children s working memory span,such as processing speed,domain specificity and storage ability.

According to the phenomemon how a blind man look at the road,the paper analyses the domain specificity of man\'s cognition when the perception has been defaulted.

Academic emotions have domain specificity,and also are related to academic motivation,meta-cognition,and cognitive resources.