Provided are an endoscope system and an endoscope that accurately measure the temperature of the distal end portion, accurately control the temperature of the optical member, and can reduce the diameter of the distal end portion. The endoscope system according to the present invention includes an optical member located at the tip, a heating unit 13 that heats the optical member, a first temperature detection unit 11 that detects temperature information of the tip, and a heating unit 13 in parallel. And a control unit 43 for controlling the heating unit 13 on the basis of the temperature information of the tip part detected by the first temperature detection unit 11, Abnormality for determining abnormality of the first temperature detection unit 11 and the second temperature detection unit 12 based on the temperature information of the tip detected by the temperature detection unit 11 and the temperature information of the tip detected by the second temperature detection unit 12 And a determination unit 42. 先端部の温度を正確に測定し、光学部材を精度よく温度制御するとともに、先端部の細径化を可能とする内視鏡システムおよび内視鏡を提供する。本発明における内視鏡システムは、先端部に位置する光学部材と、前記光学部材を加熱する加熱部１３と、先端部の温度情報を検出する第１温度検出部１１と、加熱部１３と並列に接続され、先端部の温度情報を検出する第２温度検出部１２と、第１温度検出部１１が検出した先端部の温度情報に基づき、加熱部１３を制御する制御部４３と、第１温度検出部１１が検出した先端部の温度情報、および第２温度検出部１２が検出した先端部の温度情報に基づき、第１温度検出部１１および第２温度検出部１２の異常を判定する異常判定部４２と、を備えることを特徴とする。
