The invention relates to a method for displaying an audio file during TV turning on-off time and a system; the method includes that: an audio file with presetting playing time is stored in the TV memory; the audio file is read from the memory and encoded into a certain data format to be stored in a storage unit; in the turning on-off process, the audio data is called out from the storage unit and is decoded into the original audio file for playing. The time interval from turning-on to normal display state or from power-on to shutdown and standby state of an LCD TV is about 10 sec, the user feels boring during the waiting time. By applying the method and the system, background music is added during the turning on-off process, so as to bring seeing and hearing pleasure to the user while increasing the pleasure of the user for using the LCD TV; meanwhile, the music also can remind the user that the LCD TV is in a standby state with no signal.