A simple method for the simultaneous extraction of stevioside and rebaudioside A has been studied with basic steps including extracting medicinal herbs with water, removing impurities using lime milk, neutralizing with citric acid, purifying with watersaturated n-butanol, and crystallizing fractional to obtain stevioside and rebaudioside A. The spectral data of IR, MS, and NMR have demonstrated the product structure as stevioside and rebaudioside This result is a premise for further studies.