This　study　proposes　integrating　the　catalytic　distillation　dehydrogenation　system　with　a　solid　oxide　fuel　cell　(SOFC)　system　to　recover　and　reuse　the　waste　heat　from　the　SOFC　exhaust　gases.　The　research　focuses　on　a　25　kW　SOFC　system　and　categorizes　potential　system　layouts　into　three　types　based　on　the　final　use　of　the　exhaust　gas.　Through　a　comprehensive　analysis　from　energy,　environmental,　economic　and　exergy　(4E)　perspectives,　the　results　show　that　while　the　SOFC　stack　dominates　the　energy　and　economic　factors,　leading　to　consistent　performance　across　similar　system　layouts,　the　thermodynamic　irreversibility　during　system　operation　is　influenced　by　exergy　destruction　and　exergy　loss.　Using　a　multi-criteria　evaluation　approach,　the　optimal　integration　scheme,　where　the　final　exhaust　gas　is　utilized　for　preheating　air,　was　identified　when　all　four　indicators　were　equally　weighted.　The　results　indicate　that　the　optimal　system　achieves　a　thermal　efficiency　of　46.97%　and　improves　system　energy　efficiency　by　52.59%.　Furthermore,　compared　to　the　initial　non-integrated　system,　the　integrated　system　reduces　environmental　carbon　emissions　by　58.56%,　increases　economic　efficiency　by　36.64%　and　reduces　exergy　losses　by　94.11%,　highlighting　the　advantages　of　system　integration.　More　importantly,　the　integrated　system　has　a　competitive　levelized　cost　of　electricity　(LCOE)　of　0.134　$/kWh,　demonstrating　its　potential　for　a　wide　range　of　applications,　from　small-scale　to　large　industrial　processes.　©　2025