In a first information processing apparatus, data in a first format is stored. Further, the data in the first format is transformed into a code image by using a predetermined encoding mode. Moreover, code image data in a second format is generated by combining the code image with the data in the first format. In a second information processing apparatus, predetermined information processing is performed based on the data in the first format. In a third information processing apparatus, the code image is displayed, by a first display device, based on the code image data in the second format.