The difference between common information model（CIM）and IEC61850model is one of the cross-cutting and overarching issues for constructing smart grid.Key differences between the two models are analyzed，on the basis of which，solutions given by the major research institutes are surveyed and achievements are correspondingly summed up.The internal relationships among different solutions are analyzed.Furthermore，it is pointed out that forming a common semantic model for subsequent research is the core issue，and model mapping is currently adaptive to the practical application comparatively.Some suggestions for further research are also presented.