Superhydrophobic　surfaces　have　been　widely　employed　in　both　fundamental　research　and　industrial　applications　because　of　their　self-cleaning,　waterproof,　and　low-adhesion　qualities.　Maintaining　the　stability　of　the　superhydrophobic　state　and　avoiding　water　infiltration　into　the　microstructure　are　the　basis　for　realizing　these　characteristics,　while　the　size,　shape,　and　distribution　of　the　heterogeneous　microstructures　affect　both　the　static　contact　angle　and　the　wetting　transition　mechanism.　Here,　we　review　various　classical　models　of　wettability,　as　well　as　the　advanced　models　for　the　corrected　static　contact　angle　for　heterogeneous　surfaces,　including　the　general　roughness　description,　fractal　theory　description,　re-entrant　geometry　description,　and　contact　line　description.　Subsequently,　we　emphasize　various　wetting　transition　mechanisms　on　heterogeneous　surfaces.　The　advanced　testing　strategies　to　investigate　the　wetting　transition　behavior　will　also　be　analyzed.　In　the　end,　future　research　priorities　on　the　wetting　transition　mechanisms　of　heterogeneous　surfaces　are　highlighted.