This study was carried out to obtain economically green and red purple pigment based on Cr₂O₃-Al₂O₃ and K₂Cr₂O_7-Al₂O₃-P₂O_5 system by calcining the mixed material of Cr₂O₃, A1₂O₃, Al(OH)₃, K₂Cr₂O_7 and P₂O_5 at various calcination conditions. The composition of excellent color stain developed in this study is Cr₂O₃ · 1.5 Al₂O₃ for green and K₂Cr₂O_7 36-38 Al(OH)₃ · P₂O_5 for red purple at 1300℃ for 4 hours firing. By X-ray diffraction analysis, following fact was known; 1) Cr₂O₃ · 1.5 Al₂O₃ pigment forming solid solution between Cr^+++ and Al^+++ at 1300℃, green color is more bright than others. 2) But the color of K₂Cr₂O_7-Al₂O₃-P₂O_5 system pigment is due to form amorphous complex between P₂O_5 and others for showing same X-ray patterns at various color conditions.