A device and method for cooling a hot spot are provided. The cooling device for cooling a micro hot spot includes a first substrate, a first channel formed on the first substrate and having two narrowed ends, a second channel formed on the first substrate and connected to the first channel, a cooling fluid injected into the first channel and the second channel, a second substrate connected to the first substrate and having the micro hot spot disposed thereon, two of wires disposed at the narrowed ends of the first channel, and a power supply for providing a pulse current to the wires, thereby micro bubbles being produced around the wires.