Perovskite with A-site deficiency(A_1-xBO₃) is promising candidate due to introduction of oxygen vacancy for ionic conductivity and nano-sized exsolution of B component with metal phase for catalytic activity. In this study, Ni-doped Sr_0.92Y_0.08TiO₃ perovskite has been investigated to improve the catalytic activity for CO₂ dry internal reforming of methane in solid oxide fuel cells. (Sr_0.92Y_0.08)_0.85Ti_1-xNi_xO_3-𝛿 (x=0.05, 0.10, 0.15, 0.20) perovskite with A-site deficiency is prepared by pechini method and compared to stoichiometric Sr_0.92Y_0.08Ti_1-xNi_xO_3-𝛿 (SYTN15) perovskite. The physical and physicochemical characteristics of the synthesized powders are analyzed by GC, XRD, BET, TEM, XPS, and TPO. (Sr_0.92Y_0.08)_0.85Ti_0.85Ni_0.15O_3-𝛿 (SYTN(+)15) shows the highest methane conversion with 93% and carbon dioxide conversion with 86%. In addition, the SYTN(+)15 results to the lowest decreasing rate of the methane conversion with 1.86% drop for 50h. The SYTN(+)15 shows better catalytic performance by 10% for dry reforming of methane (DRM) comparing to the SYTN15. The cell performances of the SYTN(+)15 and the SYTN15 are 60.05mW/cm² and 28.50mW/cm², respectively. Consequently, A-site deficiency catalyst, SYTN(+)15 exhibits excellent catalytic activity for DRM and sufficient electrochemical property for SOFC anode materials.