The Bi3+ doped molybdate-based red-emitting phosphors, LiEu1-xBix(MoO4)2, were successfully synthesized with a sol-gel method. The prepared LiEu1-xBix(MoO4)2 phosphors exhibited pure and intense red emission at 613 nm under the excitation of near-UV 394 nm. It was discussed in detail that the influence of the synthesis conditions such as the doping concentration of Bi3+, the dose of citric acid, pH of the precursor solution and the sintering temperature on the emission intensity of the phosphors. According to the results, the optimal condition was obtained: the doping concentration of Bi3+ was 15 mol.%, molar ratio of citric acid to metal ions was 1.5:1, pH of the precursor solution was 1.0 and the sintering temperature was 800 ?C. The X-ray diffraction (XRD) patterns of the LiEu0.85Bi0.15(MoO4)2 phosphor prepared under the optimal condition indicated that the phosphor was single phase with tetragonal scheelite structure. The Commission Internationale de l’E-clairage (CIE) chromaticity coordinates of LiEu0.85Bi0.15(MoO4)2 were (x=0.655, y=0.345), which were closer to the national television stan-dard committee (NTSC) standard values (x=0.670, y=0.330) than that of a commercial red phosphor of Y2O2S:Eu3+(x=0.630, y=0.350). This LiEu0.85Bi0.15(MoO4)2 red phosphor is a promising candidate for the fabrication of white light-emitting diode (W-LED) with near-UV chips. The prepared LiEu1-xBix (MoO4) 2 phosphors exhibited pure and intense red emission at 613 nm under the excitation of near-UV 394 nm. It was discussed in detail that the influence of the synthesis conditions such as the doping concentration of Bi3 +, the dose of citric acid, pH of the precursor solution and the sintering temperature on the emission intensity of the phosphors According to the results, the optimal condition was obtained: doping concentration of Bi3 was 15 mol.%, Molar ratio of citric acid to metal ions was 1.5: 1, pH of the precursor solution was 1.0 and the sintering temperature was 800? C. The X-ray diffraction (XRD) patterns of the LiEu0.85Bi0.15 (MoO4) 2 phosphor prepared under the optimal condition indicated that the phosphor was single phase with tetragonal scheelite structure. The Commission Internationale de l’E-clairage ( CIE) chromaticity coordinates of LiEu0.85Bi0.15 (MoO4) 2 were (x = 0.655, y = 0.345), which were closer to the national television stan dard committee (NTSC) standard values ​​(x = 0.670, y = 0.330) than that of a commercial red phosphor of Y2O2S: Eu3 + (x = 0.630, y = 0.350). This LiEu0.85Bi0.15 (MoO4) 2 red phosphor is a promising candidate for the fabrication of white light-emitting diode -UV chips.