Using the oxyfluoride silicate glass ceramics co-doped Er3+/Yb3+ ions, this paper tested fluorescence spectroscopy, absorption spectroscopy. The up-conversion luminescence properties of the Er3+ ion in the oxyfluoride glass-ceramics were studied, with analysis on the spectra of samples with Judd-Ofelt theory, and the intensity parameters are obtained, Ω2=4.4756, Ω4=1.0059, Ω6=1.2098. Radiative lifetimes of samples, transition probabilities, and fluorescence branching ratio spectral parameters are concluded. The results show that the samples formed fluoride microcrystal by heat treatment, which lower phonon energy and greatly improve the up-conversion efficiency. The infrared to green or to red up conversion luminescence intensities for the glass-ceramics are evaluated to be nearly 2 to 3 times as high as that of aluminosilicate glasses. Judd-Ofelt theory show that theoxyfluoride glass-ceramics co-doped Er3+/Yb3+ ions have high up-conversion efficiency, and it is one of fine materials for the production of micro-laser and three-dimensional display.