The endoscope system uses the imaging unit 110 in any mode of the imaging unit 110, the first mode in which imaging is performed at the first frame rate, and the second mode in which imaging is performed at the second frame rate. The first processing unit 120 to be operated, the capsule endoscope 100 including the first communication unit 130 that transmits the captured image to the external device 200, and the second processing that outputs a mode switching instruction based on the captured image. Unit 220 and an external device 200 including a second communication unit 230 that transmits a mode switching instruction, and the first processing unit 120 performs the second mode from the middle of the small intestine to the large intestine based on the mode switching instruction. Operate with.内視鏡システムは、撮像部１１０と、第１のフレームレートで撮像を行う第１のモードと、第２のフレームレートで撮像を行う第２のモードとの、いずれのモードで撮像部１１０を動作させる第１の処理部１２０と、撮像画像を外部装置２００に送信する第１の通信部１３０を含むカプセル型内視鏡１００と、撮像画像に基づいてモード切り替え指示を出力する第２の処理部２２０と、モード切り替え指示を送信する第２の通信部２３０を含む外部装置２００を含み、第１の処理部１２０は、モード切り替え指示に基づいて、小腸の途中から大腸までを第２のモードで動作させる。
