Cubic ZnTiO3 nanocrystal doped with Ni2+ ion has been synthesized by sol-gel method at a lower temperature (600℃). The crystallinity of the doped sample was characterized by the X-ray diffraction (XRD) patterns and the infrared spectra (IR). The photoluminescence (PL) spectra of the sample measured at different excitation wavelength reveal a novel luminescent phenomenon in blue, green and red region, which can be attributed to the 3T1(3P)-3A2(3F), 1T2(1D)-3A2(3F) and 1T2(1D)-3T2(3F) transitions of Ni2+ ion, respectively. The position of the emission peak does not change greatly with the excitation wavelength. However, the luminescent intensities vary with changing the concentration of Ni2+ ion in ZnTiO3.