NOVELTY - The input physical-property value data regarding the physical property value of the coal is acquired. The outlet temperature at the time of changing the inlet port temperature of each combustion zone and combustion gas in each combustion zone flowing down to a downstream combustion zone is repeated and calculated using temporary outlet temperature of each combustion zone calculated by heat-budget calculation unit. The outlet temperature of each combustion zone calculated by the zone outlet temperature calculation function is reported.    USE - Combustion-control program of combustion facility for use in power generation equipment of thermo power plant.    ADVANTAGE - Determination of the coal raw material is performed easily. The temperature distribution in a combustion facility is accurately determined by easy calculation with outlet temperature for every combustion zone so that the qualities of coal raw material are improved. Thus the combustion state is evaluated efficiently by easy structure, in order to economically burn low grade coal stably.    DETAILED DESCRIPTION - The physical-property value data, the supply amount rate data and temperature data were acquired by the input data-acquisition unit. The temporary outlet temperature for every combustion zone which makes zero calorie amount income and expenditure for every some combustion zone is calculated where the combustion gas in the combustion facility is flowed down. INDEPENDENT CLAIMS are included for the following:    (1) combustion efficiency determination program of coal;    (2) combustion control system of combustion facility; and    (3) combustion efficiency determination apparatus of coal.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of combustion control system of operational management system. (Drawing includes non-English language text)    Operational management system (10)    Combustion control system (12)    Input unit (20)    Combustion condition input data acquisition unit (56A)    Heat-budget calculating unit (56B)