In　order　to　assess　structural　damage　with　complete　consideration　of　various　parameters　and　enhance　the　accuracy　of　assessment,　a　comprehensive　method　for　seismic　damage　evaluation　on　reinforced　concrete　structure,　which　took　internal　damage　index,　maximum　inter-storey　drift,　number　of　inelastic　cycles　and　energy-concentrated　quotient　as　evaluation　factors,　was　established　based　on　Set　Pair　Analysis　(SPA)　theory.　This　method　was　constructed　by　using　sample　values　compared　with　the　value　of　standard　grade.　Using　this　model,　the　situation　of　seismic　damage　on　reinforced　concrete　structure　can　be　accurately　identified　by　depicting　the　relationship　between　the　two　sets　from　all　the　aspects　of　the　same-contrary-indefinite　characteristics.　This　method　was　verified　clearly　through　the　practical　example,　and　the　rationality　and　validity　were　demonstrated.　By　this　practice　example,　the　model　proved　to　be　accurate　and　logical　in　evaluating　the　degree　of　structural　seismic　damage.