Provided is an image processing device which includes a storage unit (14) and a selection unit (15). The storage unit (14) stores a plurality of data formats corresponding to different image qualities, as data formats specifying at least two elements from among resolution, color expression, update cycle, and gradation which are elements relating to the image quality of an image displayed by a display device which continuously subjects frame image data to display processing and displays images. Furthermore, the storage unit (14) stores importance information indicating the importance of an element. If a detection unit (16) detects that the communication environment has degraded, the selection unit (15) selects, for an element selected based on the importance information stored in the storage unit (14), a data format having a lower quality specified format than the format specified by the data format currently selected.