Borogermanate scintillating glasses with composition of 25B2O3-40GeO2-2Eu2O3-33RE2O3 (RE = Y, La and Gd) were synthesized by melt-quenching method. The effect of RE2O3 on the glass structure and performance including the density, transmittance as well as luminescent properties under both ultraviolet (UV) and X-ray excitation were compared and studied systematically. The enhanced intensity of Eu3 + emission under X-ray excitation is remarkably higher than that under UV excitation. The temperature-dependent emission spectra in the 75-295 K temperature region reveal that the thermal quenching behavior of Eu3 + luminescence in Y2O3-based glass is slightly better than that in La2O3- or Gd2O3-based one. The covalency property of Eusbnd O bond and the local environment of Eu3 + ions is evaluated by the values of Ωt parameter by employing the Judd-Ofelt analysis. The possible interconnection among the covalency nature of Eusbnd O bond, the thermal quenching behavior of Eu3 + emission, and the thermal stability of the designed borogermanate scintillating is also discussed.