After　fire,　the　strength　of　steel　materials　and　stiffness　of　artifacts　decrease　significantly,　which　cause　the　redistribution　of　internal　forces　and　increase　the　difficulty　in　testing　of　materials,　identification　and　evaluation　of　steel　structures　after　fire.　This　paper　mainly　discusses　the　identification　and　evaluation　of　steel　structure　of　one　project　undertaken　a　fire　by　empirical　test.　It　is　speculated　that　the　temperature　of　the　fire　was　more　than　850　degrees　C,　area　covered　includes　(1)similar　to(4)/Q　similar　to　W　axis　and　(5)similar　to(6)/H　similar　to　W　axis　of　the　factory,　after　the　fire　in　the　safety　appraisal　building　assessment,　it　is　categorized　as　class　C　which　influences　the　safety　of　the　whole　structure.　From　the　results　of　this　appraisal,　suggestions　are　made　which　could　be　regarded　as　a　guide　in　similar　engineering　projects　in　the　future.