The thermosensitive ceramics of neg. temperature coefficient (NTC), SrCo1-xRuxO3 (0 ≤ x ≤ 0.8), were synthesized using the solid-phase method.The research systematically explored the phase structure, microstructure, elemental chem. states, elec. properties, and aging performance.X-ray diffraction (XRD) data indicates that with the increase of Ru content, the lattice parameter increases.SEM (SEM) images reveal a dense and uniform microstructure.XPS data indicates the presence of Co2+/Co3+ and Ru4+/Ru5+ ion pairs.Resistive temperature data indicates its potential use as a low-temperature thermosensitive resistance material in the range of 2-300 K.Fitting the resistance-temperature curve using the thermally activated band conduction model and Mott′s 3D variable range hopping model.Proposed the Ru-O2--Co hopping model, elucidating the hole hopping transport mechanism in NTC ceramics.Impedance spectroscopy anal. indicates that grain boundary resistance dominates the overall resistance of the sample.After aging at 77 K for 864 h, the maximum aging drift rate of the ceramic material is 1.55 %.Proposed a novel cationic vacancy diffusion model to explain aging phenomena, offering a new perspective for designing high-stability low-temperature NTC thermistors.