Praseodymium coordination polymers with ortho hydroxylbenzoic acid was used as the precursors of luminescent species to compose with polyethylene glycol (PEG), and inorganic/organic hybrid polymeric dispersing media were assembled by a modified in-situ sol-gel process of tert-n-butyl titanate (Ti( OC4H9 )4 ) and further thermal decomposed to achieve rare earth oxysalts ceramic phosphor SrTiO3: Pr3 +. Both XRD and SEM indicate that the particle sizes of them were in the range of around 1 μm. The excitation spectra presented a brand spectral band in visible blue-violet region of the maximum excitation peak of 445 nm, and the corresponding emission spectra exhibit wide emission with maximum peak of 619 nm, which was ascribed to be the characteristic transition of Pr3+ (1D2→3 H4). It can be expected to be applied in the visible light conversion materials.