A new coherent reception space communication adopting photorefractive quantum device is discussed. The complicated intermediate frequency tracking electronics can be omitted in this system, as compared with traditional heterodyne reception. It is also capable of suppressing the interference such as wavefront distortion, random vibration of polarization and Doppler frequency shift, which are common to optical transmission in turbulent atmosphere between mobile vehicles. The experimental result of homodyne reception and the wavelength conversion characteristics of photorefractive quantum device are reported.