PROBLEM TO BE SOLVED: To provide a watching system capable of detecting biological information of plural subjects individually and accurately with a simple constitution.SOLUTION: The watching system includes: plural radio wave detection sections 42 radiating and receiving micro waves and thereby detecting biological information of subjects plural temperature control sections 46 respectively arranged correspondingly to and individually adjacent to the plural radio wave detection sections 42 and capable of changing an ambient temperature of the radio wave detection sections 42 and a setting section setting a setting temperature of the plural temperature control sections 46 individually. The radio wave detection section 42 has a characteristic changing a frequency of a radiated micro wave by influence of an ambient temperature. The setting section sets setting temperatures of the plural temperature control sections 46 individually so as to prevent interference and cross talk of the frequencies of the micro waves radiated by the radio wave detection sections 42 with each other.SELECTED DRAWING: Figure 2
