In　this　work,　quenching　stress　generated　during　the　deposition　process　and　the　Coefficient　of　Thermal　Expansion　(CTE)　thermal　mismatch　stress　produced　during　the　cooling　down　process　of　Double-Ceramic-Layers　Thermal　Barrier　Coating　System　(DCL-TBCs)　have　been　intensively　examined.　The　thickness　ratio　of　Lanthanum　Zirconate　(LZ,　La2Zr2O7)　coating　to　stabilized　Zirconia　(YSZ,　ZrO2-8%Y2O3)　coating,　have　been　theoretically　analyzed.　In　addition,　DCL-TBCs　specimens　with　different　thickness　ratio　of　LZ　to　YSZ　coatings　were　fabricated,　to　study　the　effect　of　this　thickness　ratio　by　specimen　curvature　and　crack　density　analysis.　Meanwhile,　Finite　Element　Method　(FEM)　has　been　carried　out　to　validate　results　obtained　theoretically.　The　results　reveal　that　by　comparison　to　CTE　thermal　mismatch　stress,　quenching　stress　has　remarkable　effect　on　total　thermal　stress.　By　increasing　thickness　ratio　of　YSZ　to　LZ　coatings,　average　thermal　stress　and　crack　densities　in　YSZ　and　LZ　coatings　increased.　Nevertheless,　the　curvature　ratio　of　DCL-TBCs　specimen　decreases.