Audio output system and method for changing sound content thereof

An audio output system comprising:

• in both online and offline states, an audio output device configured to output first sound content;
• a user device configured to control the audio output device;
• and
• a server configured to communicate with the user device and the audio output device through communication networks, respectively, and to provide a service environment for controlling the audio output device to the user device,
• wherein the audio output device includes an audio output station including a sound figure corresponding to the first sound content and a docking space to which the sound figure is docked, and configured to recognize the sound figure docked to the docking space and to output the first sound content corresponding to the recognized sound figure,
• wherein the service environment includes a function of changing the first sound content corresponding to the sound figure, and
• wherein the server is configured to;
• receive a request to change the first sound content corresponding to the sound figure from the user device,
• process the request to change the first sound content corresponding to the sound figure in consideration of a state of the audio output device,
• based on the audio output device being in the online state, the audio output device, while the sound figure is docked in the docking space, changes the first sound content stored in the sound figure to second sound content according to the request, and
• in the offline state, the audio output device outputs the second sound content stored in the sound figure based on the sound figure being docked in the docking space.