Abstract: Full-aperture backscatter station (FABS) installed on Shenguang-ⅡLaser Facility is reported. This diagnostic is a spatially averaged mix of light from all of the laser-plasma interactions in the field of view collected by the laser beam focusing lens. Lights in two different wavelength ranges (348～354 nm and 400～700 nm) corresponding to stimulated Brillouin and stimulated Raman backscattering are measured by two calorimeters. The energy, power, and spectrum of backscattered light can be given respectively. The time-resolved spectra will be determined with a goal of SRS temporal response with 10 ps resolution and dimensional response with 0.5 nm resolution. Near backscattered light outside focusing lens is diagnosed based on an array of PIN diodes.