Automatic transportation system and control method thereof

The embodiment of the invention discloses an automatic transportation system and a control method thereof. The automatic transportation system comprises a crown block body, a rotating shaft, walking wheels, a locking piece, a grabbing piece and a transferring assembly. The rotating shaft is rotatably arranged on the crown block main body; the locking piece is movably arranged on the walking wheel and can be switched between a locking state and an unlocking state, in the locking state, the walking wheel is connected to the rotating shaft through the locking piece, and in the unlocking state, the walking wheel can be separated from the rotating shaft; the grabbing part is used for grabbing or releasing the walking wheel, the grabbing part exerts acting force on the locking part in the walking wheel grabbing process so that the locking part can be switched to the unlocking state from the locking state, the grabbing part cancels the acting force on the locking part in the walking wheel releasing process so that t