In this paper, thetechnology of fixing and developing of thermal fixing of holograms in photorefractiveLiNbO3 crystals is described in detail. The dependence of the peak diffractionefficiency of grating on the temperature was measured at fixing stage. The experimentalresults of developing show that developing by reference beam usually suffer fromself-enhancement, Bragg-angle shift, selective angel broadening and scattering noiseincreasing. Developing by incoherent light can avoid these disadvantages. In this paper, amethod of decreasing coherent degree of light is proposed for developing by originalrecording optical set-up.