A heat dissipating system of a multi-media computer includes a computer case, a first heat dissipating area, and a second heat dissipating area. The first heat dissipating area is formed on an inner side of the computer case, wherein a hard disk driver, a video graphics card, and a TV tuner card are installed therein. The second heat dissipating area is formed on the other inner side of the computer case, wherein a power supply module is installed therein. Heat flows are formed in the first heat dissipating area and the second heat dissipating area respectively.