Abstract: With the rapid development of informatization education，personalized learning system has the advantage of breaking time and space limitation，attracting many learners of different ages． As an important part of the personalized learning system，domain knowledge model has attracted more and more attention from domestic and foreign scholars． Main modeling standards，and domain knowledge model was proposed to construct the reference standard． With the learning theory as the instruction，focusing on learners' individual behavior，students jointly participated in the collective wisdom of generation，in the important role of building a domain model，built by the individual domain knowledge model，the individual domain knowledge model aggregated into collective domain knowledge，realizing the connection between knowledge and knowledge，collective domain
knowledge model and affect the individual domain knowledge model，the optimization of individual domain knowledge model，and then complete the construction of domain model and optimization，the“personal”and “collective”the construction of knowledge system has a strong reference and guiding significance．

Key words: collective intelligence, personalized learning system, domain knowledge model