In this paper, we present the study on the infrared absorption spectrum, near ultraviolet region and visible region reflection spectrum of Agl(Cr2O3) composite ion-conductor. It is found that the two spectra observed are not the same as that of pure Agl and Cr2O3. There is a new absorption peak in the range of 882-889 cm-1 in infrared spectrum. The photodis-sociation characteristic at long wave direction from 430 nm of Agl disappears in electronic spectrum. The reflection spectrum hands of d-d absorption transition caused by ligand field effect of Cr2O3 are centered at 410 nm and 530 nm. For Agl(Cr2O3), the band at 410 nm disappears and the band at 530 nm shows red-shift and its intensity decreases with the increasing of Cr2O3. There is more strong absorption in the whole ultraviolet and visible region Based on the concept of the double-phonon coupling, the distortion polarization of medium and the ligand theory, combining with the TEM results, the phonon spectrum and electronic spectrum of Agl(Cr2O3) compsite ion-conductor are analyzed.