A maintenance information supply system, including: a host terminal including
a
data base for storing information regarding a periodic inspection time or a part
replace time for a predetermined electronic device terminal; and the electronic
device terminal, provided with an information sending/receiving function for communicating
with the host terminal. The electronic device terminal sends to the host terminal,
device kind information and present position information or working environment
information. The host terminal searches the information regarding the periodic
inspection time of the electronic device terminal or a part replace time from the
data base. The host terminal calculate maintenance information according to the
present position information or working environment information, and a predetermined
calculation table, so as to send the maintenance information to the electronic
device terminal; and the electronic device terminal receives the maintenance information
from the host terminal.