Traditional metal-supported solid oxide fuel cells (MS-SOFCs) typically utilize yttria stabilized zirconia (YSZ) as the electrolyte with operating temperature of about 800 ℃. In order to enable MS-SOFC to serve at low temperature, this study used gadolinium doped ceria (GDC), which exhibits higher conductivity at lower temperature, as the electrolyte to facilitate the practical application of MS-SOFC. Tape casting was employed to fabricate thin-film anodes (NiO-GDC) and electrolytes (GDC), while ultrasonic spraying was used to prepare the cathode material La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ(LSCF)-GDC. The resulting components were assembled onto a metal support to construct an MS-SOFC with a thin-film GDC electrolyte, and its electrochemical performance was evaluated. At 650 ℃, the total impedance of the cell was 0.50 Ω·cm², with Ohmic impedance of 0.23 Ω·cm² and polarization impedance of 0.27 Ω·cm², and the maximum power density was 336 mW/cm². The cell was operated at 550 ℃ under a constant voltage of 0.5 V for 100 h without significant degradation. Its electrolyte and anode, which were prepared by warm isostatic pressing and co-sintering, were tightly bonded. After long-term operation, no delamination between layers of the cell was observed, indicating that structural stability ensured the long-term stability of the MS-SOFC. MS-SOFCs in this study prepared via a process route combining tape casting, warm isostatic pressing, and direct assembly, displayed excellent electrochemical performance and long-term stability, providing a new approach for industrial production of low-temperature SOFCs.