The invention discloses a sleep music device which includes a first monitor and a monitoring terminal connected with the first monitor in a communicating mode. The first monitor includes a connectionbelt, a fitting rod, a fitting plate, a first supporting assembly, a second supporting assembly, a brain wave sensor, a first micro-control unit, a first Bluetooth module, a first storage module, a first battery, a first speaker, a second speaker, a first extension band, a second extension band, a first earplug and a second earplug. The structure of the sleep music device is simplified, and a useronly needs to wear one first monitoring device to realize brain wave collection and suitable music playback according to the collected brain wave data; and wearing the sleep music device is the sameto wearing headphones, and the first monitoring device is small in size, elastic materials are adopted in many places, wearing is very comfortable, the user does not have any unsuitable feeling and resistance, and the sleep music device is very practical.