The invention discloses a QR code generation system. The system is used for generating a QR code image of the surface of a transparent material, and the QR code generated through the system can be applied to a product package, a goods shelf, a commodity trading counter, an anti-fake tag, a parking lot and other positions. The system comprises a receiving part used for receiving QR code data needing to be printed; an image generation part used for generating a QR code image from the QR code data; an image inversion part used for performing color inversion on code elements of the QR code image;a first printing part used for printing light-colored pigment on black code elements obtained after inversion on the transparent material; and a second printing part used for printing color-changing ink on the light-colored pigment printed by the first printing part on the black code elements of the inverted image on the transparent material, wherein the color-changing ink is transparent under normal temperature and becomes dark after temperature is changed.