Two　types　of　typical　thermal　cycling　tests　are　used　for　the　evaluation　of　thermal　cycling　lifetime　of　thermal　barrier　coatings.　Those　are　burner　cycling　tests　with　a　thermal　gradient　and　isothermal　furnace　cycling　test.　There　are　diverse　explanations　to　test　results　up　to　now.　Although　certain　correlations　should　exist　between　the　results　obtained　by　two　types　of　the　tests,　no　evident　parameters　in　two　tests　were　directly　related　possibly　due　to　large　range　of　difference　test　conditions.　In　this　investigation,　a　series　of　TBC　samples　with　carefully　prepared　Al2O3-based　TGO　of　different　thicknesses　were　used　for　both　burner　cycling　and　furnace　cycling　tests.　The　relationships　between　thermal　cycling　lifetime　and　TGO　thickness　were　obtained　for　two　types　of　the　tests.　It　was　found　that　TGO　thickness　presents　the　same　influence　tendency　despite　different　thermal　cycling　tests.　The　results　reveal　the　existence　of　the　critical　TGO　thickness　by　which　the　transition　of　failure　mode　takes　place.　Moreover,　the　values　of　the　critical　TGO　thickness　for　two　tests　are　comparable.　The　results　evidently　suggest　that　the　lifetimes　during　different　thermal　cycling　tests　can　be　correlated　by　TGO　effects　on　failure　behavior.　However,　it　is　clear　that　the　apparent　dominant　driving　factor　to　TBC　failure　is　different　in　two　type　tests.　Thus,　the　burner　cycling　test　could　be　used　for　optimizing　the　durability　of　ceramic　top　coat,　while　the　furnace　cycling　test　results　represent　the　integrated　TBC　durable　performance　of　the　bond　coat　and　top　ceramic　coating.