The purpose of this study was to investigate the natural dyeability of silk on extract of Artemisia princeps, The experimental items were divided into the mordanting method. comonent of fabric, kind of mordant. The experimental study was done by laundering fastness, abrasion(dry/wet) fastness, perspiration(acid/alkali) fastness, light fastness test and color difference by C.C.M system. The summarized finding resulted from experiments and investigation are suggested as follows; First, in the C. C. M test on mordanting methods, color difference was significantly improved when mordants were treatmented. And the premordanting method showed the highest color difference, color was most yellow-greenish, Second, in the C.C.M test on component of fabrics, color difference of silk was higher than cotton. It is considered that silk has -$NH_2$ , -COOH, -OH than more than cotton. Third, in dyeing-fastness on mordants, laundering fastness showed that color-change was 2~3 grade, the contamination on attached fabric was 4~5 grade. perspiration fastness(acid/alkali) showed 4~5 grade nearly and those of acid was higher than alkali. abrasion fastness(dry/wet) was 4~5 grade and in Fe(3~4 grade) was lower than the other mordants. Forth, in color difference analysis on mordants, Fe(50.0) showed the highest and the order of color difference was alum(16.0), Cu(7.2), Sn(3.5), Al(3.1), Cr(2.3), The Hue was turned into yellow-greenish in alum mordant treatment, the luminocity of color was most dark in Fe(-48.9) and Cu(-7.2), chroma was the highest in alum (15.7) method.