Novel Dy3+ and Ce3+ doped Si-B-Na-Sr (SBNS) glasses were synthesized by melt-quenching technique. Excited by 327nm, the 0.5Dy3+-and 0.5Ce3+-doped SBNS exhibits white emission with Commission Internationale de L'Eclairage coordinates of (0.308, 0.280). Basic optical characterizations have been performed by measuring the absorption and emission spectra and calculating Judd-Ofelt intensity parameters, radiative probability, luminescence branching ratio, cross sections, and effective bandwidth. The Judd-Ofelt parameters 2, 4, and 6 indicate a high asymmetrical environment and covalent environment in the optical glass. The emission color of Ce3+ and Dy3+ codoped transparent glass can be tuned from blue to white through energy transfer from Ce3+ to Dy3+ ions. The resulting glass may have potential application in white-light-emitting source.