The present invention discloses a cooling fan having electrical power drawing from the computer, its power line ends have the plugs of the USB, 1394 and PS2 to connect to arbitrary outlets of mobile computer, computer host, or the hub of the USB, 1394 and PS2. The cooling fan includes a basis, a front shell, a rear shell, a fan set, a speed tuner, a power signal line and a connecting plug. The cooling fan also has a recess on the bottom of front side of the basis to support individual card reader, HUB, hard disk or radio device, and additionally has a signal line and plug for connecting to the computer.