A series of white fluorescent powder Gd₂(MoO₄)_3were synthesized b y high temperature solid state method.in which and the excitation spect rum,emission spectrum and luminescence properties of the sample were analyzed by testing their fluorescence spectra,and the phase structure were analysed by X- ray diffraction (XRD). The color of phosphor is determined by testing the color coordinates and so on.T he emission spectra show that the blue light emission (²F₉→⁶H15/2 transition of Dy3+ ) and yellow light emission (²F₉→⁶H13/2 t ransition of Dy³⁺) are maximum under 387nm excitation.The Commission International Edl eclairage (CIE) of fluorescent powder Gd 2－x(MoO₄)₃:xDy3+ is changed from white to yellow with the increase of Dy³⁺ concentration . Both the yellow light emission (²F₉→⁶H13/2 transition of Dy³⁺) and the blue light emission (¹D₂→³F₄transition of Tm³⁺) are existed under 361nm excitatio n ,so the fluorescent powder Gd1.88－y(MoO₄)₃: 0.12D^y3+,yTm³⁺ can produce white light by c hanging the concentrations of Dy³⁺ and Tm³⁺.The results that show wh en the Tm³⁺ concentration is 7%～15％,and the doping concentration of Dy³⁺ is 12%,the CIE of fluorescent powders are in white l ight area,and the CIE of the sample with 12% Tm³⁺ concentration is (0.338 8,0.3293) closest to that of standard white light of(0.33,0.33).In this experiment,the energy transfer from Tm³⁺ to Dy³⁺ can b e found.