CaSnO 3 phosphors doped with various Eu 3+ concentrations are synthesized by a solid-state reaction. The crystal structure of the phosphors is identified by the XRD technique, and it is found that the pure phase CaSnO 3 phosphor can be obtained when the Eu 3+ doping concentration lower than 2mol%. The emission spectra consisting of a group of sharp lines from blue to red light originating from 5 D 3,2,1,0 → 7 F J transitions of Eu 3+ are observed in phosphors with various Eu 3+ doping concentrations. The radiative lifetimes of 5 D 0 level are measured for the samples with various Eu 3+ concentrations, and for the sample with 2mol% Eu 3+ at various temperatures. The oscillator strengths parameters (Judd–Ofelt parameters) Ω λ (λ=2, 4, 6) of Eu 3+ in CaSnO 3 phosphors are calculated to be 3.21×10 −20 , 0.88×10 −20 and 0.35×10 −20 cm 2 . The photoluminescence excitation and photoluminescence spectra are measured in the temperature range 300–750K. The thermo-dynamical behavior for 5 D 3 , 5 D 2 , 5 D 1 and 5 D 0 populations are analyzed based on the temperature-dependent emission spectra of 5 D J levels.