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The wettability of graphene that makes graphene as a functionalized material has attracted widespread attention in the domain of surface engineering. This article starts from the fundamental simulation method for the wettability of graphene, and summarizes the effects on the wettability of graphene which contains defect structures, surface topography, aerial contaminations and so on. Based on the research about the analysis of graphene transparent wettability, the paper expounds the reason why the tendency of transparent wettability in graphene could be generated, and generalizes the research about the graphene transparent wettability. With the two different coating materials which is graphene and graphene oxide, this paper discusses the method to form the superhydrophobic graphene surface. Tn term of research and development status of functional surface wettability of graphene, some key scientific issues that are needed to be solved are proposed in this paper. The future study of wettability of graphene is also prospected in the end. [ABSTRACT FROM AUTHOR]