CaMoO4∶Ho3+ phosphors were synthesized by sol-gel method. The samples were characterized by X-ray powder diffractometer, fluorescence spectrometer and were refined by Rietveld method. The effects of the concentration of Ho3+ on the luminescence properties were studied and the color coordinates of CaMoO4∶Ho3+ were calculated. The results show that the optimal concentration of Ho3+ is 2%(mole fraction). The concentration quenching mechanism is verified to be electric dipole-electric dipole interaction. The color coordinates range of phosphors of this series: x is 0.298 7 to 0.317 7, and y is 0.664 4 to 0.689 7, which belongs to green light-emitting area. CaMoO4∶Ho3+ could be efficiently excited by 450 nm, which is a potential green phosphor for white LED.