A file execution method and system for a portable device for expediting an execution of files is provided. A method for executing an audio file including at least one track associated with a cover image includes displaying a first cover image associated with a track that is playing and displaying a first track list on the first cover image in response to a first key input signal, the first track list listing tracks associated with the first cover image. The portable device implemented with the file execution method and system of the present invention enables a track list to be displayed together with a cover image shared by a set of tracks listed on the track list, thereby expediting execution of files.