To provide a communication system capable of moving a moved data to only source equipment, after the source equipment moves the data to sink equipment.

First communication equipment 101 transmits a device ID unique to the first communication equipment 101 to second communication equipment 110, when moving the held data to the second communication equipment 110, and the second communication equipment 110 holds the data moved from the first communication equipment 101, and the device ID unique to the first communication equipment 101, thereafter determines whether a device ID is the device ID unique to the first communication equipment 101 or not, when receiving the device ID from the first communication equipment 101 or the third communication equipment 111, and moves the held data to the first communication equipment 101, only when the device ID is determined to be the device ID unique to the first communication equipment 101, by an identifier.

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