A cooking device comprising, an induction heating module including a case , a cover plate coupled with the case to form an inner space, a plurality of heating areas formed on an upper plate portion of the cover plate , a plurality of working coils disposed in the inner space at a position corresponding to the plurality of heating areas , a power supply unit configured to supply power to the plurality of working coils , and a control unit configured to control power supply to the plurality of working coils by applying a control signal to the power supply unit and a plurality of knob modules configured to set a heating power level or a cooking time of the plurality of heating areas , wherein each of the plurality of knob modules includes: a knob to which the heating power level is assigned, the knob rotating in a first direction or a second direction, corresponding to each rotational position, and being set to have preset intervals; a knob ring which returns to an initial position thereof after being moved in the first direction or the second direction, and increases or decreases the cooking time by a preset adjustment unit; and a display unit which is formed at one side of the knob ring and displays the heating power level or the cooking time, wherein the control unit is configured to set the induction heating module in an operation mode, wherein the induction heating module includes a first heating area and a second heating area , and an operation mode of the induction heating module is set to either a normal mode in which the first heating area and the second heating area are configured to operate as separate heating areas and a flexible mode in which the first heating area and the second heating area are configured to operate as a single heating area , wherein, when the operation mode of the induction heating module is the normal mode, each of the plurality of knob modules is set as a control device for corresponding heating areas , wherein, when the operation mode of the induction heating module is the flexible mode, one of the plurality of knob modules is set as a control device for heating areas , and the display unit of the knob modules which is set as a control device for heating areas displays letters indicating the flexible mode. a knob to which the heating power level is assigned, the knob rotating in a first direction or a second direction, corresponding to each rotational position, and being set to have preset intervals; a knob ring which returns to an initial position thereof after being moved in the first direction or the second direction, and increases or decreases the cooking time by a preset adjustment unit; and a display unit which is formed at one side of the knob ring and displays the heating power level or the cooking time, wherein the control unit is configured to set the induction heating module in an operation mode, wherein the induction heating module includes a first heating area and a second heating area , and an operation mode of the induction heating module is set to either a normal mode in which the first heating area and the second heating area are configured to operate as separate heating areas and a flexible mode in which the first heating area and the second heating area are configured to operate as a single heating area , wherein, when the operation mode of the induction heating module is the normal mode, each of the plurality of knob modules is set as a control device for corresponding heating areas , wherein, when the operation mode of the induction heating module is the flexible mode, one of the plurality of knob modules is set as a control device for heating areas , and the display unit of the knob modules which is set as a control device for heating areas displays letters indicating the flexible mode. <EOS>