PURPOSE: A hair coloring composition is provided to show coloring stability without biological toxicity and to remarkably shorten hair coloring time. CONSTITUTION: A hair coloring composition contains: a first agent containing 100 g of purified water, 900 g of glycerin or 10-80 g of poly(ethylene glycol), 0.001-1 g of AgNO3, and 0.1-30 g of sodium salts selected among sodium succinate, sodium citrate, sodium malate, sodium stannate, sodium fumarate, and a mixture thereof; and a second agent containing 50-150 g of glycerin, 0.01-20 g of FeSO4, and 0.001-20 g of tannic acids. A hair coloring method comprises the steps of: wetting hair and applying the first agent onto a part of the wet hair; rinsing and drying the hair; and applying the second agent onto the hair. [Reference numerals] (AA) First agent; (BB) Second agent본 발명은 본 발명은 모발 염색용 조성물 및 이를 이용한 모발 염색방법에 관한 것이다. 본 발명에 따라 생물학적 독성이 없으면서, 염색 안정성이 우수하고, 염색시간을 획기적으로 단축할 수 있는 염모 조성물 및 이를 이용한 모발 염색방법이 제공된다.