The antioxidant and anti-diabetes effects were evaluated by the ethanol extracts from Astragalus membranaceus root classified by years using through DPPH radical scavenging activity, hydroxyl radical (${cdot}OH$) scavenging activity, total phenolic and flavonoid contents, reducing power activity, $alpha$-amylase and $alpha$-glucosidase inhibitory activities. $IC_{50}$ values for DPPH radical scavenging activity of ethanol extract from 6 years old root ($749.25{mu}g/mL$) was higher than 1 year ($1452.67{mu}g/mL$) and 3 years old root ($1095.61{mu}g/mL$). 6 years old root showed better effects in ${cdot}OH$ scavenging activity ($IC_{50}$: $10.58{mu}g/mL$), reducing power, total phenolic contents ($26.13{pm}0.79;Tan;{mu}g/mg$, $24.03{pm}0.74;Cat;{mu}g/mg$) $alpha$-amylase ($33.33{pm}0.55%$) and $alpha$-glucosidase inhibitory activity ($49.71{pm}1.01%$). On the other hand, total flavonoid compound contents were estimated much higher in 1 year old root ($44.93{pm}1.35;Que;{mu}g/mg$, $70.32{pm}2.03;Rut;{mu}g/mg$) than others. Based on these results, It was suggested that 6 years old root of A. membranaceus has a potential candidate for functional cosmetic and medicine.