Abstract: A carrier applying precision support and lifting by an Automated Guided Vehicle includes a frame, two supporting arms, and pressing components. Two supporting arms are located on either side of the frame and are movable in a receiving direction relative to the frame. The pressing components are located on the frame, the pressing components include first pressure balls, for pushing the supporting arms across the carrier, and second pressure balls for pushing the supporting arms along the receiving direction. The first and second balls improve the positioning accuracy of the supporting arms relative to the object or material to be transported and reduces friction between the supporting arms and the pressing components. An AGV cart and a loading system are also disclosed.