In order to achieve a management device capable of managing the history of the location of a care-receiver, the management device includes a processor. The processor carries out a communication process of performing communication, via any of a plurality of relay terminals, with a sensor terminal which is worn by a care-receiver and which includes an excretion sensor and a determination process of determining a location of the care-receiver, based on a relay terminal which mediated the communication with the sensor terminal in the communication process.