A conveyor apparatus including a control module, an unwinding module, at least one tension sensing module, and a rewinding module is provided. The tension sensing module includes a load cell disposed between a set of rollers. An objet is conveyed along a conveying direction perpendicular to an axis of the roller. A wrap angle is formed by the object and the roller with a fulcrum of the loadi cell served as a center, and the wrap angle is less than 180 DEG . The rewinding and unwinding modules have different actuating units electrically connected to the control module respectively, such that the object is wound or unwound by the rewinding and the unwinding modules.