A wireless audio service automatic resetting method and a wireless audio system are proposed. In the wireless audio service automatic resetting method and the wireless audio system thereof that are for a slave device, the slave device requests and receives latest audio service group information from a master device by connecting to a wireless network, and performs a corresponding operation by determining whether to recover to an in-service state on the basis of the latest audio service group information. Accordingly, the slave device may be conveniently recovered to the in-service state again without user's input, thereby receiving provision of a desired audio service.