Cooperation system, mobile information device, cooperation processing method, and non-transitory computer-readable recording medium encoded with cooperation processing program

A cooperation system includes an image forming apparatus and a mobile information device. The image forming apparatus includes a storage portion which stores source data, and an image forming portion which forms an image of the source data on a sheet of paper. The mobile information device includes an image pickup portion, an image pickup control portion which acquires a picked-up image that the image pickup portion outputs by picking up an image of the image formed on the sheet by the image forming apparatus, a source data acquiring portion which acquires the source data corresponding to the picked-up image from the image forming apparatus, a process target determining portion which determines, on the basis of the picked-up image, a process target part to be processed within the acquired source data, and a process executing portion which executes processing on the determined process target part within the source data.