To provide an image processing device and a printing system, which prevents reduction in overall processing efficiency.

A print data receiving part 11 takes out print data received by a network interface, and temporarily stores the print data in a storage part. A print data RIP part 12 performs RIP for the print data by using the latest density correction information stored in a color table 13. A print data rendering part 15 renders data subjected to RIP, to generate image data for printing (raster data). When the print data of the next print job is obtained while the image data for printing of the previous print job is printed, a determination part 16 determines whether to start generating the image data for printing of the next print job without waiting for the completion of the printing of the previous print job.