|This study was conducted to evaluate the antioxidant activities of water extracts of green tea (GT), white tea (WT) and black tea (BT). The polyphenol contents of EGCG, GT, WT, and BT were 436.0, 105.5, 108.7, and 106.2 mg/g, respectively. The electron-donating abilities of EGCG, GT, WT, and BT at 100 μg/mL were 91.7, 90.2, 90.2, and 89.6%, respectively. The ABTS radical abilities of EGCG, GT, WT, and BT at 100 μg/mL were 99.5, 85.5, 92.2, and 83.7%, respectively. The SOD-like activities of EGCG, GT, WT, and BT at 1,000 μg/mL were 28.9, 26.3, 28.7, and 31.1%, respectively. The nitrite scavenging ability of EGCG, GT, WT, and BT at 3,200 μg/mL were 99.1, 99.5, 99.4, and 99.6%, respectively. It was conformed that GT, WT and BT had high antioxidant activity, and they could be a useful functional source for the cosmetic materials.