To rapidly detect a residual quantity of kerosene in a kerosene tank in a kerosene supply system and to rapidly measure a kerosene consumption amount in each home with a simple means.

In this kerosene supply system, kerosene purchasers 62-1, etc., connected to the tank 60 by piping 64 through integrating flowers 68-1, etc., are connected to a computer 78 of a kerosene supplier 76 through telephone lines 70A. The computer 78 connected with the plural groups is inputted with the kerosene residual amount value of the tank in each the group, updates the kerosene residual amount on the basis of a value gotten by subtracting the kerosene consumption amount value of the whole purchasers within a prescribed time calculated on the basis of periodically inputted integrated flow rate signals from the kerosene residual quantity value, and gives a warning of kerosene supply to the tank 60 when the kerosene residual quantity value becomes smaller than an allowable minimum residual amount in the tank 60. The kerosene is fully supplied into the tank 60, and the kerosene residual quantity value is inputted in a full capacitance value. The kerosene consumption amount of each kerosene customer is calculated at periods of charge claim.