This study aimed to investigate the effects of yogurt added with blueberry powder on the quality characteristics (CIE color value, pH value, and sensory evaluation) and antioxidant activity (DPPH radical scavenging activity, FRAP assay, total polyphenol content, and total flavonoid content). The yogurt samples were prepared with the following amounts of blueberry powder (0% (Control), 2%, 4%, and 6%). The CIE L * and CIE b * value of samples were decreased with increasing concentration of blueberry powder (p<0.05). However, The CIE a * value of samples was increased tendency with an increasing amount in blueberry powder. Overall acceptability of samples containing 4% blueberry powder were significantly higher than those of control (p<0.05). DPPH radical scavenging, total polyphenol contents, total flavonoid contents of samples significantly increased with increasing concentration of blueberry powder (p<0.05). Samples containing blueberry powder showed significantly higher FRAP than those of the control (p<0.05). These results were indicate that blueberry powder 4% could be enhance the antioxidant activity and quality characteristics of yogurt.