a remaining fuel amount in a vehicle or a machine is remotely monitored, and an appropriate refueling plan for each vehicle or machine is made according to situations. A remote fuel monitoring system according to an embodiment of the present application consists of a vehicle-mounted device and a server for monitoring a remaining fuel amount of the vehicle or the machine based on vehicle information received from the vehicle-mounted device, for calculating a refueling plan including refueling time and a refueling amount for the vehicle or the machine, and for outputting a refueling command based on the refueling plan for the vehicle or the machine to a refueling means, and characterized in that the server includes an input means, a storage means, an analyzing means for analyzing information regarding the remaining fuel amount of the vehicle or the machine based on the vehicle information and information stored in the storage means, a refueling plan calculation means for calculating the refueling plan for the vehicle or the machine by using the information regarding the remaining fuel amount analyzed by the analyzing means, and an output means for outputting the refueling plan for the vehicle or the machine to the refueling means.
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