Silver and copper(I)-halide (Cl, Br and I) crystals and the mixed crystals are known to be a photo sensitive and ionic conductivie material. As a first step of the fundamental study, we analyzed the electronic states of the solid pure CuX and AgX (X=Cl, Br and I) crystals, and complete solid solution CuClxBr1-x and CuBrxI1-x (X=0. 75, 0. 5 or 0. 25) crystals by considering the Cu and Ag chemical shieldings by ab initio MO calculations using GAUSSIAN program.