Disclosed is an active and water-soluble natural detergent composite using soybean fatty acid and lecithin, and a method of producing the same. The method comprises agitating a mixture consisting of a natural vegetable fatty acid, lecithin, alkanolamide, and an organic solvent such as higher alcohol or polyhydric alcohol, saponifying the mixture to form microscopic detergent particles moving according to Brownian movement, and controlling the resulting detergent in terms of moisture and pH to allow the resulting detergent to be in a neutral or alkaline state. The detergent composite comprises 14 to 22 parts by weight of soybean fatty acid, 2 to 4 parts by weight of lecithin, 6 to 14 parts by weight of alkanolamide, 15 parts by weight of isooctylphenoxy polyoxyethoxy ethanol, 42 parts by weight of distilled water, 10 parts by weight of p-tert-oxyphenoxy polyethoxy ethanol, and 3 parts by weight of ethylene diamine tetracetic acid.