This study was conducted between April and July of both 2008 and 2010 at the Jeoksangsan (Mt.) of the Deogyusan National Park to examine the birds community of the region. A total of 730 individuals of 54 species, 27 families and 10 orders were observed during the study period. Dominant species included the Ardea cinerea at 148 individuals (29.72%), followed by the Paradoxornis webbianus at 93 individuals (12.74%), the Passer montanus at 91 individuals (12.47%), the Streptopelia orientalis at 33 individuals (4.52%), and the Hypsipetes amaurotis at 31 individuals (4.25%). The 2008 study showed a total of 498 individuals of 48 species and the 2010 study showed a total of 567 individulas of 46 species. This showed that the transition from 2008 to 2010 resulted in decrease in the number of species but increase in the number of individuals. Species diversity was higher in 2010, while species richness was slightly higher in 2008. The survey area was divided into forest region (more than 400m above sea level, total distance of 7km) and surrounding region (lower than 400m above sea level, total distance of 10km), and the result of the study of avian fauna in the regions showed a total of 191 individuals of 32 species, 20 families and 7 orders in the forest region and a total of 616 individuals of 44 species, 24 families and 10 orders in the surrounding region. In terms of density per distance, the surrounding region showed a higher level, at 58.67 Ind./km in comparison to the 27.29Ind./km of the forest region. On the other hand, in terms of species diversity, the forest region showed a much higher level at 3.04, when compared to the 1.95 of the surrounding region, and in terms of the species richness, the surrounding region showed 6.69, a value higher than the 5.90 of the forest region. The dominant species of the two regions differed. This is predicted to be caused by the different habitat structure and food resources distribution resulting from their environmental differences.