In Oxyfluoride glass ceramics,Re ions partitions into the floride crystal,while fluoride crystals is surrounded by oxide.This material is in low phonon energy state.It has better up conversion intensity,and its mechanism is better than fluoride.Under proper heat treatment,the fluoride crystal is about several nms in dimension,and this material can still keep transparent.So it can be used in up conversion devices,Pr 3+ fiber amplifier,and three dimensional display.This article shows some research development and possible application of this material.