Abstract: The research on intelligent systems is recently an important topic in AI research field. The schemes of gaint intelligent system are divided into four types: (1) Closed giant intelligent system scheme; (2)Semi-closed giant intelligent system scheme; (3) Semi-open giant intelligent system scheme; (4) Open giant intelligent system scheme. Besides, through such classification, the meaning of "social" style for building system as well as system architecture is analysed. And a sequence of giant intelligent system scheme is obtained.