The activated carbon was produced from Sancheong bamboo by carbon dioxide gas activation methods. The carbonization of raw material was conducted at 900 ℃, and CO2 activation reactions were conducted under various conditions: activation temperatures of 750-900 ℃, flow rates of carbon dioxide 5-30 cm3/g-char·min, and activation time of 2-5 h. The yield, adsorption capacity of iodine and methylene blue, specific surface area and pore size distribution of the prepared activated carbons were measured. The adsorption capacity of iodine (680.8-1450.1 mg/g) and methylene blue (23.5-220 mg/g) increased with increasing activation temperature and activation time. The adsorption capacity of iodine and methylene blue increased with the CO2 gas quantity in the range of 5-18.9 cm3/g-char·min. But those decreased over those range due to the pore shrinkage. The specific volume of the mesopore and macropore of bamboo activated carbon were 0.65-0.91 cm3/g. Because of this large specific volume, it can be used to the biological activated carbon process. Bamboo activated carbon phisically adsorbed the CO2 of maximum 106 mg/g-A.C in the condition of 90% CO2 and adsorption temperature of 20 ℃. The CO2 adsorption ability of bamboo activated carbon was not changed in the 5 cyclic test of desorption and adsorption.