Abstract: Temperatures of two hot springs around the Changbaishan volcano (NE China) have simultaneously increased about 3℃ since May 2010 based on the newest monitoring results of the Changbaishan Volcano Observatory. Moreover, the altitude of northern slope of the Changbaishan volcano cone decrease about 12.72mm in 2010 whereas it increases around 4mm/a before 2009. This study preliminarily discusses the possible reasons for occurrence of above observations and precludes a link to the active phase of the Changbaishan volcano in the near future. Because the active period of the volcano is characterized by large amounts of volcanic earthquakes swarms and sharp increase in mantle-derived He contents, more precise prediction should be made on the base of detail monitoring work on volcanic earthquakes and volcanic gases in future. Using N2-He-CO2 ternary diagram, we recognize that the concentration of He increased aggressively from 2002 to 2005, and the gases in the ternary diagram immigrated to the He apex during the primitive perturbation episode. Changbaishan volcano has entered into a quiescent episode since 2005 and the emitted gases began to immigrate to the N2 apex. The variation of He concentration in the emitted gases reflects the characteristics of gas composition evolution in magma chamber.