Using NaCl(OH-):(F2+)H color center crystal made by authors as laser medium, the low temperature infrared tunable CW color center laser operation has been realized successfully in the X-model laser cavity, with tunable laser wavelength from 1.40 μm to 1.75 μm and its peak wavelength is at 1.57 μm. Some problems such as several absorption bands of (F2+)H color center, the relation between color center laser output and laser medium, as well as auxiliary light have been discussed in this paper.