This study was conducted for the purpose of evaluating the amount of enteric fermentation methane emission from pigs according to the breeding temperature. The external structure was manufactured using flexible glass and profile, and It was made by sealing the emitted methane so as not to leak out. The inlet and exhaust were manufactured, and a ring blower was installed at the exhaust to circulate air, and the real-time flow rate was measured with a mass flow meter. Methane concentration and temperature were measured in real time using an automatic measuring system. The experimental pigs was conducted for two days at low temperature (13 C) and high temperature (25 C) on two 6-month-old fattening pigs, and feed was supplied at 09: 00 am and 15: 00 pm twice a day and the pigs were given free access to water. As a result of the study, the methane concentration was 14 ppm at low temperature and 21 ppm at high temperature, which was about 33% higher than that at low temperature (p< 0.05), and 6.5 g per day at high temperature (p< 0.05) and 4.6 g per day at low temperature were emitted. As a result of analyzing the dry matter digestion rate of feed intake and excreted manure, 74.08% at low temperatures and 71.10% at high temperatures, showing similar results to previous studies. Therefore, the digestivility was related to the amount of methane generated, and the lower the digestion rate, the higher the methane emission.