The present disclosure relates to the field of shared bicycles, and in particular, to a multimedia system of a shared bicycle. The multimedia system includes a lock main control unit, a cloud server, a display unit and a short message unit. The lock main control unit is connected to the cloud server, the display unit and the short message unit, respectively. The display unit includes a storage device. The lock main control unit detects a stored content of the storage device and controls the short message unit to send a push signal to the cloud server when the stored content does not include multimedia data. The cloud server sends the multimedia data to the storage device based on the push signal. The lock main control unit controls the display unit to turn on when a lock of a shared bicycle is unlocked and controls the display unit to turn off when the shared bicycle ends a trip. The multimedia system downloads the multimedia data only when there is no multimedia data stored, and deletes the stored content periodically to release a storage space, which can facilitate a user to obtain more multimedia data.
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