The invention discloses an oil tank oil quantity monitoring and optimizing method. The oil tank oil quantity monitoring and optimizing method comprises the following steps of monitoring real-time dataof an oil tank by a liquid level sensor, carrying out filtering processing on the collected real-time data of the oil tank and reporting the real-time data to a display to be displayed, wherein the method comprises the following specific steps of carrying out basic processing: enabling the liquid level sensor to perform oil tank real-time data acquisition at certain frequency, and calculating theaverage values A of a plurality of real-time data of the oil tank collected every second, and taking the average values A as the oil tank real-time data at the second; carrying out reporting processing: dividing the average values A in a certain period into three parts according to the size sequence, removing the two parts of the maximum value and the minimum value, reserving the intermediate value part, calculating the average values B of the intermediate values, and updating the average values B at a certain interval and taking the average values B as the display oil quantity; and carryingout data correction, finally eliminating the environmental influence, and achieving the purpose of accurately monitoring the oil quantity of the oil tank.