Dy3+ ion doped Gd2O3 phosphors with varying concentrations were synthesized successfully by hydrothermal process. The XRD patterns and TEM images of prepared samples were well-studied. Upon the emission at λem = 573 nm, the excitation spectra consist of several peaks which denote the characteristic lines of the 4f-4f or 4f-5d intra-configurational transition of Gd3+ and Dy3+ ions. In the emission spectrum obtained by excitations at 234 nm and 273 nm, consist of two characteristic band obtained at 485 and 573 nm, which are attributed to 4F9/2→6H15/2 (blue) and 4F9/2→6H13/2 (yellow) transitions of Dy3+ ion, repectively. The photoluminescence lifetime are found to be at around 0.599-1.200 ms. The CIE Chromaticity coordinates showed the prepared samples could be used as a white light emitting phosphor applied in near UV region.