As　a　carbon-free　hydrogen　(H2)　carrier　with　the　advantage　of　liquefaction　storage　and　transportation,　ammonia　(NH3)　is　regarded　as　a　competitive　clean　energy　carrier　for　H2　production　and　power　generation.　This　work　designs　a　novel　NH3-fueled　hybrid　power　generation　system,　which　combines　ammonia　decomposition　reactor　(ADR),　proton　exchange　membrane　fuel　cell　(PEMFC)　and　micro　gas　turbine　(MGT)　together　with　thermochemical　recuperation　for　ADR.　A　system-level　thermodynamic　model　has　been　developed　to　evaluate　system　performance　with　different　optimization　strategies.　The　model　calculation　reveals　that　the　NH3　decomposition　temperature　drop　from　500　degrees　C　to　350　degrees　C　can　increase　the　energy　efficiency　from　33.5　%　to　43.2　%,　and　two　improved　integration　strategies　have　therefore　been　proposed.　Mixing　a　part　of　NH3　with　the　exhaust　gas　from　PEMFC　anode　to　fuel　MGT　can　reduce　the　NH3　decomposition　demand　and　makes　better　use　of　waste　heat　from　MGT.　Integrating　ADR　with　MGT　combustor　can　lower　the　exhaust　gas　temperature　and　the　efficiency　loss　when　using　high　temperature　NH3　decomposition　catalyst.　Both　strategies　can　improve　the　system　energy　efficiency,　to　about　40%　and　44%　when　NH3　decomposition　temperature　is　500　degrees　C　and　350　degrees　C,　respectively,　and　demonstrate　better　flexibility　in　adapting　to　changes　in　NH3　decomposition　temperature.