An object of the invention is to provide a configuration that can teach an operator improvement of a fuel consumption amount and that facilitates a comparison with other operator in real time and a comparison with a past operation history, without requiring presetting of a fuel consumption amount during an average operation time. There is provided a remote server (5) that receives a machine type, an operating day, a position, a load factor (L), an engine rotational speed (Ne), a traveling speed (V), and a fuel consumption amount (C). The remote server (5) identifies a working position based on the position, selects past operating days of an operation status corresponding to a current load factor (L) of the same machine at the same working position, identifies a minimum fuel consumption amount (Cmin) out of fuel consumption amounts corresponding to the selected past operating days, and compares a current fuel consumption amount (C) with the past minimum fuel consumption amount (Cmin). If the current fuel consumption amount (C) is larger than the past minimum fuel consumption amount (Cmin), the remote server (5) transmits the engine rotational speed (Ne) and the traveling speed (V) during the working period of the minimum fuel consumption amount, to a predetermined communication terminal corresponding to information for machine identification.
