A barcode, comprising: a code region, comprising at least two different types of information which represents code information of the code region; and a boundary region, formed as a closed shape surrounding the code region; wherein a decoding direction of the code region is not relative to the boundary region. The present invention also provides a barcode processing system which can process the barcode to generate a control command, and provides a coffee machine using the barcode processing system. The barcode can be easily aligned by a closed boundary region, without using a frame buffer with a large size.