///The paper firstly introduces the research status of using thermal infrared remote sensing technology to monitor volcanic activity around the world, and then reviews the principle of thermal infrared remote sensing technology. Finally, the authors obtain the annual surface temperature variation of the study area, which is believed to be caused by volcanic activity in the magma chamber. The results indicate that the temperature of the study area increased with an intermittent tendency during 1999 to 2005, but dropped after 2005, and then maintained a stable tendency during 2006 to 2008.