Energy　transition　has　brought　widespread　attentions　to　the　concept　of　coupled　utilization　of　the　geothermal　and　solar　energy.　This　paper　provides　an　integrated　assessment　on　developing　a　nanofluid　geothermal-photovoltaic　hybrid　system　that　addresses　the　multi-objective　optimization　and　multi-criteria　evaluation　difficulties.　The　coupling　system　design　and　dispatch　are　optimized　by　considering　the　multiple　objectives　from　the　microscopic　particles　to　the　system.　The　life　cycle　cost,　levelized　cost　of　energy,　levelized　cost　of　heat,　and　the　irreversibility　are　introduced　in　the　optimization　stage.　The　optimization　parameters　include　the　pipe　arrangement,　type　of　nanoparticles,　and　the　concentration　of　the　nanoparticles　in　nanofluids.　A　combined　analysis　including　the　energy,　exergy,　economy,　and　the　environment　is　proposed　to　evaluate　the　various　objectives　and　cases.　The　results　show　that　the　combination　of　2%　Al2O3　nanofluid　and　spiral　pipe　has　the　optimum　performance.　The　monocrystalline　solar　panels　with　the　nanofluids-aided　heat　pump　create　the　least　CO2　emissions　(550　kg/year),　the　least　LCOE　(198.18　$),　and　the　highest　exergy　efficiency.　However,　the　LCOH　(211.78　$/MWh)　is　still　much　high.　Only　when　the　electricity　cost　is　higher　than　0.11$/kWh,　the　proposed　coupling　system　would　show　competitiveness.　In　summary,　these　results　effectively　prove　the　robustness　and　superiority　of　the　hybrid　system.　©　2022　The　Author(s)