The　objective　of　this　paper　is　to　propose　a　contactless　evaluation　system　with　fiber　laser　Doppler　vibrometer　to　diagnose　the　location　of　frescos　damage　for　historical　frescos　on　curved　surface.　This　article　outlines　a　noninvasive　diagnostic　test　system　and　procedure,　advantage　of　which　is　no　damage　to　the　artwork,　and　that　is　based　on　the　frequency　response　analysis　of　the　acoustic　excitation　of　the　wall　vibration.　The　detail　of　the　test　procedure　for　wall　vibration　and　the　system　of　the　measurement　instrument　is　described.　Experiments　were　performed　on　a　real　artificial　fresco　in　a　historic　curved　vault.　A　2D　map　of　curved　surface　oscillate　amplitudes　is　generated　by　measuring　points　by　points　on　the　surface.　This　false-color　image　is　further　treated　through　image　analysis　procedure　to　settle　the　locality　and　structure　of　the　destruction　area.　©　2021　IEEE