The invention discloses a one-off payment scanning code method, apparatus and system. The method comprises scanning and payment steps, and further comprises a one-time marking step which enables a scanning code and/or a covering of the scanning code to be subjected to visible and unrecoverable physical change. The physical change includes but not limited to deformation, color change, color fading and traces; and a physical change mode includes but not limited to a mode of using one or a combination of multiple of hands, light, gas and electromagnetism. The apparatus is characterized by further comprising a one-time marking unit. The system comprises the one-off payment scanning code apparatus. The scanning code includes but not limited to barcodes, graphs, images, and texts; and the barcodes include one-dimensional and two-dimensional codes. By adopting the one-off payment scanning code method, apparatus and system, repeated scanning code payment of users is prompted or prevented, and the technical problem of the repeated scanning code payment of the users is solved; and therefore, the one-off payment scanning code method, apparatus and system has extremely high commercial application value and prospect.