Abstract: This invention discloses a portable presentation operating device that can fully operate presentation software or perform multimedia playback functions under the Windows operating system of a computer via wireless communications. Such operating device comprises a wireless remote controller and a receiver installed in a computer system; wherein the remote controller is equipped with a four-key 8-dirctional cursor control press button for automatically changing the cursor speed in the Windows operating system according to the user's operating mode, and an instruction key equivalent to the press button of a mouse. In addition, this device also has the functions of a laser pointer. When users use presentation software to make a business presentation, this device can fully support the functions required for the operation of the presentation software.