Communication device includes first sensor configured to measure a state of a sensing target person to acquire first measurement data, second sensor configured to measure a body temperature to acquire second measurement data, and memory unit configured to store a reference body temperature for a single or each of a plurality of predetermined states of the sensing target person. Communication device further includes state determiner configured to determine whether or not the sensing target person is in the single or any one of the plurality of predetermined states, and abnormality determiner configured to compare the reference body temperature with the body temperature of the sensing target person to determine whether or not the sensing target person has a body temperature abnormality.