Label printing device and image detecting, positioning and counting method thereof

The invention discloses a label printing device and an image detecting, positioning and counting method thereof. The label printing device comprises an unwinding device, a printing device, a camera device, a winding device and a calculation storage medium. The unwinding device is composed of an unwinding mechanism and a guide mechanism, and the unwinding mechanism is used for containing blank label rolls and guiding blank label paper to an inlet of the printing device. And the printing device consists of a label edge detection sensor and a set of printing imaging device and is used for printing an image on the blank printing label. The camera device is composed of a camera assembly and a base, wherein the camera assembly is used for shooting a printed label image and transmitting image data to a computing storage medium. And the winding device is used for collecting and rewinding the printed, photographed and counted labels. The calculation storage medium is composed of a computer and a peripheral device and