We provide a necklace-type terminal equipped with an
environmental sensor device and a
biosensor device. [Solution] The necklace-type terminal is worn by a mobile
organism to collect data in an area where plants are grown. The necklace-type terminal includes a
biosensor device, an
environmental sensor device, an acoustic collector that detects acoustic vibrations including sound
waves from outside the necklace-type terminal and sound
waves emitted by the
organism, a data collection unit that collects data signals from the
biosensor device, the
environmental sensor device, and the acoustic collector and generates output data, a first
communication unit configured to receive output data from the data collection unit and capable of communicating with a
data processing device located outside the necklace-type terminal, and an electroacoustic converter that converts electrical signals from the first
communication unit into acoustic vibrations. The environmental sensor device includes an optical sensor device that detects light at the location of the necklace-type terminal.