A capsule endoscope system includes a capsule endoscope and a receiving device. The capsule endoscope outputs execution command at a timing at which work instruction data is received when movement speed is low, and outputs the execution command at a timing at which output of the execution command is instructed when the movement speed is high. The receiving device generates the work execution condition data and the work instruction data based on operations of an operator, and transmits the work execution condition data and the work instruction data to the capsule endoscope.
