Induction heating device and method for controlling induction heating device

The present specification relates to an induction heating device and a method for controlling an 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 the driving frequency of the working coil in which the required power value is not changed, and compares the calculated difference value with a predetermined first reference range. When the calculated difference value is included within a first reference range, the controller changes an operation mode or a power control mode of a first inverter circuit or a second inverter circuit, and changes an output power value of the working coil, in which the required power value has been changed, to the third required power value.