We　demonstrate　the　transition　of　band　structure　from　flatband　to　type-III　Dirac　cones　in　an　electromagnetically　induced　Kagome　photonic　lattice　generated　in　a　three-level　?-type　Rb-85　atomic　configuration　both　experimentally　and　theoretically.　Such　instantaneously　reconfigurable　Kagome　photonic　lattice　with　flatband　is　＂written＂　by　a　strong　coupling　field　possessing　a　Kagome　intensity　distribution,　which　can　modulate　the　refractive　index　of　atomic　vapors　in　a　spatially　periodical　manner　under　electromagnetically　induced　transparency.　By　introducing　an　additional　one-dimensional　periodic　coupling　field　to　cover　any　one　set　of　the　three　inequivalent　sublattices　of　the　induced　Kagome　photonic　lattice,　the　dispersion-less　energy　band　can　evolve　into　type-III　Dirac　cones　with　linear　dispersion　by　easily　manipulating　the　intensity　of　the　one-dimensional　field.　Our　results　may　pave　a　new　route　to　engineer　in　situ　reconfigurable　photonic　structures　with　type-III　Dirac　cones,　which　can　act　as　promising　platforms　to　explore　the　underlying　physics　and　beam　dynamics.