The present invention discloses a vacuum glass middle support placing system that includes a glass plate placing station, a middle support placing station, a vacuum sealing station, a pallet and a conveyor. The pallet is directly conveyed by the conveyor to transfer it among the stations and the glass plate is placed on the pallet at the glass plate placing station. The pallet includes a supporting face that is matched with a surface of the glass plate and a glass plate positioning structure. A magnetic attraction surface array made of permanent magnets and corresponding to the middle supports to be placed on the glass plate is arranged on the supporting face.