A medical system includes: a transmitter (200) which is configured to acquire biological information of a patient, and which is configured to transmit the biological information through an inherent channel; a setting terminal (300) which is configured to recognize identification information for identifying a patient, which is configured to acquire the channel from the transmitter, and which is configured to transmit association information in which the identification information is associated with the channel; and a receiver (400) which, by using the association information transmitted from the setting terminal, is configured to register the identification information and the channel in association with each other.