A communication system includes: sender-side communication equipment including a detection unit configured to detect information indicating the condition of a user, and a transmission unit configured to transmit information indicating the condition of the user detected through the detection unit to a communication partner; and receiver-side communication equipment including a reception unit configured to receive information indicating the condition of the user transmitted from the sender-side communication equipment, a notification unit configured to notify the condition corresponding to the condition of the user received through the reception unit, and a control unit configured to control the notification unit based on information indicating the condition of the user received through the reception unit.