1. An induction heat cooking apparatus comprising:a power supply configured to supply an alternating current (AC) voltage;
a rectifier configured to convert the AC voltage into a direct current (DC) voltage;
a working coil configured to operate based on the DC voltage generated from the rectifier;
a first switch and a second switch that are configured to control supply of the DC voltage to the working coil and that are configured to alternately apply the DC voltage to the working coil;
a comparison circuit that is configured to sense current flowing in the working coil, that is configured to compare the sensed current to a reference value, and that is configured to generate output pulses based on a comparison result of the sensed current with respect to the reference value; and
a controller configured to:
count a number of the output pulses generated from the comparison circuit, and
determine whether a cooking vessel is present on the working coil based on the number of the output pulses.