The invention provides a raw coal bunker dynamic compensation processing system and method. The system comprises a coal bunker weight collection module, a calibration system module, a coal-conveying programmable control data module, and a master communications calculation module, wherein the coal bunker weight collection module is used for monitoring load of a coal bunker, collecting weight of the coal bunker, and transmitting monitored and collected data to the master communications calculation module, the calibration system module is used for controlling a standard sensor and collecting data of the standard sensor, and transmitting the data of standard sensor to the master communications calculation module, the coal-conveying programmable control data module is used for exchanging data with a coal-conveying programmable control system of a thermal power plant, transmitting a coal bunker signal and data in the coal-conveying programmable control system to the master communications calculation module, and transmitting data obtained by the master communications calculation module to the coal-conveying programmable control system, and the master communications calculation module is used for collecting and calculating data of the coal bunker weight collection module, the calibration system module, and the coal-conveying programmable control data module, determining working modes, and calculating a coal feeding value and a bunker adding value according to different working modes.