Induction heating device and method for controlling induction heating device

The present specification relates to an induction heating device and a method for controlling the induction heating device. In one embodiment of the present specification, when a user changes a required power value of a first working coil or a second working coil to a third required power value, a controller determines a third driving frequency corresponding to the third required power value. The controller according to one embodiment of the present specification calculates a difference value between the third driving frequency and a driving frequency of a working coil in which the required power value has not been changed, and compares the calculated difference value with a predetermined first reference range. When the calculated difference value is included in the first reference range, the controller changes an operation mode of a first inverter circuit from a full bridge mode to a frequency doubling mode, and changes an output power value of a working coil in which the required power value has been changed to the third required power value.