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The luminescent borate glasses co-doped Tb 3? / Eu 3? were successfully synthesized by conventional melting quenching technique. Under 378 nm UV-light excitation, the 542 nm emission intensity of Tb 3? weakened gradually and a shorter decay time was found with increasing the content of Eu 3? concentration, confirming the occurrence of Tb 3? to Eu 3? energy transfer. The luminescent color tunable from pure green to yellow and finally to orange was observed in the Tb 3? /Eu 3? co-doped borate glasses. The fluorescence intensity ratio between the 542 nm of Tb 3? : 5 D 4 ? 7 F 5 transition and 702 nm of Eu 3? : 5 D 0 ? 7 F 4 transition in the luminescent glass was found to be highly temperature-dependent with a good sensitivity of 0.357 % K -1 . Such Tb 3? /Eu 3? co-doped borate glasses may present potential application in solidstate lighting and optical temperature sensors.