A management device of the emission amount or reduction amount of greenhouse gases including: a communication unit that performs communication with an IC card on which an ID and history information on activities outside of a designated area are recorded; a control unit that performs authentication by the read ID via the communication unit, and in a case when authentication is successful, reads the history information via the communication unit, and obtains information relating to the emission amount or reduction amount of greenhouse gases from the read history information; and a display unit that displays the information relating to the emission amount or reduction amount of greenhouse gases.