Ocean　site　can　be　modeled　as　a　fluid-seabed-bedrock　system,　in　which　the　seabed　is　horizontally　layered　poroelastic　medium　and　the　bedrock　is　a　solid　medium.　The　estimation　of　the　wave-induced　and　earthquake-induced　responses　of　the　seabed　played　an　important　role　in　the　design　of　offshore　structures,　which　has　attracted　the　attention　of　researchers　and　engineers.　Based　on　Biot＇s　poro-elastic　theory,　semi-analytical　solutions　are　derived　to　evaluate　the　wave-induced　and　vertical　earthquake-induced　responses　of　the　fluid-stratified　seabed-bedrock　(FSSB)　system.　The　solutions　for　the　wave-induced　and　vertical　earthquake-induced　responses　of　the　fluid　medium,　the　poro-elastic　medium,　and　the　solid　medium　are　first　derived.　Then,　the　transfer　matrix　is　obtained　by　applying　the　continuous　conditions　between　the　interfaces　of　the　stratified　seabed.　Finally,　a　new　wave　dispersion　equation　for　waves　propagating　over　the　FSSB　system　and　the　analytical　solution　for　the　wave-induced　and　vertical　earthquake-induced　responses　of　the　FSSB　system　are　established　by　using　boundary　conditions.　Based　on　the　present　solution,　the　effects　of　fluid-seabed　interaction　and　seabed-bedrock　interaction　on　the　wave　characteristics,　wave-induced　and　vertical　earthquake-induced　responses　were　investigated　in　detail.