Narrow-dispersed nanocrystalline TiO 2 :Eu 3+ phosphors have been synthesized by reverse micelles and solvothermal synthetic method in toluene solutions. Different concentrations of europium nitrate pentahydrate (5.0, 10.0, 20.0 and 25.0mol%) were dissolved in water. After the solution was thermally treated at 250°C for 20h in an autoclave, low-dispersed TiO 2 :Eu 3+ nanocrystalline particles with average size of <5nm were synthesized. The nanocomposites were composed nominally of TiO 2 shell with Eu 2 O 3 core. The crystalline phase and microstructure of the nanoparticles were investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM), respectively. Also, luminescent spectra and composition ratio were measured using luminescent spectrometer and energy dispersive X-ray spectrometer. The radiation was dominated by the red emission peak at 616nm and the highest emission intensity was observed with TiO 2 :Eu 0.2 , whose brightness was increased by a factor of 1.9 in comparison with that of TiO 2 :Eu 0.05 . The photoluminescence and excitation spectra show similar behavior as a function of Eu concentration.