To provide a heat treatment control unit and a heat treatment control method capable of attaining high heating efficiency and at the same time attaining the uniform temperature distribution of an object to be heated.

An off-line PC 10, by using data of an object W to be heated necessary for simulation and data of an electric furnace 1, performs simulation to uniformly heat the whole including the inside of object W to be heated to calculate as heating temperature data indicating the heating temperature every time. Then, a control PC 20 controls the output of heating means depending on the heating temperature data. At this time,varying temperature data to be estimated are calculated on the basis of the measured temperature data from a temperature sensor, and a heater K is controlled depending on the estimated varying temperature data.