This invention discloses a method of controlling the multimedia audio and video playback by installing an audio/video playback program, a playback control program, and a data storage medium in a computer device, wherein the audio/video playback program adjusts a setup value for each of the playback setup options and saves the adjusted setup value into the data storage medium, such that after the computer device is booted every time, the playback control program detects the execution of the audio/video playback program and determines whether or not a multimedia file is waiting to be executed; if yes, it loads the setup value of the playback setup option from the data storage medium, so that the audio/video playback program can play the multimedia file according to the content of the setup value.