The doped SrTiO3 as a thermoelectric material has been extensively studied both experimentally and theoretically. Though theoretical studies have found the thermoelectric coefficients changing as functions of temperature, they are less useful to guide experiments because there is no direct comparison with the existing experimental results. Combining the latest experimental results, we investigate the lanthanum nanostructure doped SrTiO3 theoretically by applying the density functional theory and the Boltzmann transport theory. For most doping levels, we find that the new Fermi levels are above...