An endoscope system includes a first capsule endoscope device and a second capsule endoscope device. The first capsule endoscope device is introduced into a living body before the second capsule endoscope device is introduced. The first capsule endoscope device includes a first image sensor and a first processor that controls an imaging operation by the first image sensor. The second capsule endoscope device includes a second image sensor and a second processor that performs a change process for control on an imaging operation by the second image sensor based on first information on the first capsule endoscope device.
