Provided is a system for controlling a hot-rolled steel plant capable of accurately ascertaining temperature distribution inside a steel plate when a steel material arrives at a delivery side of an induction heating apparatus. A system for controlling a hot-rolled steel plant is provided with: an extraction temperature computation unit for computing the temperature distribution inside the steel material when the steel material is extracted from a heating furnace; an entry-side temperature computation unit for computing, on the basis of the temperature distribution inside the steel material computed by the extraction temperature computation unit, the temperature distribution inside the steel material when the steel material arrives at an entry side of the induction heating apparatus disposed on a delivery side of the heating furnace; and a delivery-side temperature computation unit for computing, on the basis of the temperature distribution inside the steel material computed by the entry-side temperature computation unit, the temperature distribution inside the steel material when the steel material arrives at a delivery side of the induction heating apparatus.
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