Feeding device and feeding method

The invention provides a feeding device and a feeding method. The feeding device comprises a reel, a sensor and a control unit. A material roll is arranged on the reel, and the feeding device is used for rotating the reel to convey a material belt in the material roll. The sensor is used for sensing material roll information and sending the material roll information to the control unit. The control unit is used for controlling the rotating state of the reel according to the material roll information. According to the scheme, the production efficiency and the automation degree can be improved.