In a capsule endoscope system that includes a capsule endoscope (10) including a transmitting unit for transmitting captured image data and a display unit for visualizing and displaying the image, and including an external device, units (131 to 133) are included for initiating power supply to a capsule main body in such a state that an imaging window (120b) and an illumination window (120a) are covered by a package (70), an image-data-correction value is acquired from image data obtained by performing a first imaging of a chart (71) for acquiring an image-data correction value, the chart (71) arranged inside the package so that the chart faces the imaging window, with the package (70) covered, image data obtained by performing a second imaging is corrected by the correction value, and the image data is visualized to be displayed on the display unit.
