An image data processing controller includes circuitry to receive, from a server, output target image information, and command information including a description of process setting information in a first format used for generating and outputting an image, set description conversion setting information to one or more specific job receiving units, convert, when the description of process setting information in the first format is not interpretable by the image data processing controller, the description of process setting information in the first format into the description of process setting information in a second format interpretable by the image data processing controller by referencing the set description conversion setting information, and generate image drawing information to be used by an image generator based on the output target image information, and the command information including the description of process setting information in at least one of the first and second format.