Abstract:[Purpose/significance] On the basis of domestic research,this paper systematically sorts out related literatures on data fusion and integration abroad,aiming at providing references for the work in the field of data fusion and integration[Method/processes] This paper mainly reviews relevant research,research approaches and methods,and applications and challenges,and points out future research directions from three aspects:concept,path and application[Result/conclusions] Research approaches and methods include data fusion and integration model and framework,phasebased strategy,featurebased representation method and semanticbased applicationAnd it is found that there are common or special application challenges in each field