Recently, it increases in use of CFT(Concrete filled steel tube, below CFT) because it an excellent internal force and deformation capacity. But, CFT column lose bearing capacity when steel tube is exposed under fire. In case of the Europe, Japan and America, it have been studied the fire-resistance performance of CFT to use actual specimen. Fire resistance performance of CFT column is determined to internal concrete at fire. Therefore, it is able to evaluate mechanical properties at elevated temperature though specimen reduce the scale. In this study, it is experimentally investigated in effects to use CFT Stub Column at elevated temperature. This study is aimed to study the effect of elevated temperatures ranging from 20 to $700^{circ}C$ on mechanical properties of concrete according to strength of concrete and fiber mixing. Tests were conducted with ${Box}75{ imes}75{ imes}H200$ mm CFT Stub Column and ${O}100{ imes}200$ mm cylinder specimens, which compared to that observed at $20^{circ}C$. As a result, compressive strength decreased at $100^{circ}C$, rose again at $200{sim}300^{circ}C$ and decreased over $300^{circ}C$. But elastic modulus is decreased continually, and there were deferent as intended compressive strength at elevated temperature. Failure mode shows local buckling at a third of length.