treatment system 1, the supply and the treatment instrument 2 having a pair of holding portions 10 for applying thermal energy to the heat generating portion 20 is generated in the living tissue LT held between opened and closed freely, a drive signal to the heat generating portion 20 temperature and the signal output section 31, a setting unit 32 for setting a target temperature of the heating unit 20, a signal detecting section 33 for detecting the current and voltage of the driving signal, the heat generating unit 20 by adjusting the power of a drive signal a control unit 34 for controlling, a signal extractor 35 to the signal detecting section 33 extracts a signal of a predetermined frequency band from the drive signal for detecting failure of the heating unit 20 the extracted signal to the signal extraction unit 35 has extracted based on a failure detection unit 36 to detect the aura phenomenon, the failure detection unit 36 includes a display unit 37 to notify a warning if it detects a sign phenomenon, the.処置システム1は、開閉自在で間に保持した生体組織LTに発熱部20が発生した熱エネルギーを印加する一対の保持部10を有する処置具2と、発熱部20に駆動信号を供給する信号出力部31と、発熱部20の目標温度を設定する設定部32と、駆動信号の電流及び電圧を検出する信号検出部33と、駆動信号の電力を調整することにより発熱部20を温度制御する制御部34と、信号検出部33が検出する駆動信号から所定の周波数帯の信号を抽出する信号抽出部35と、信号抽出部35が抽出した抽出信号をもとに発熱部20の故障の前兆現象を検知する故障検知部36と、故障検知部36が前兆現象を検知した場合に警告を告知する表示部37と、を具備する。
