In a server, a client information acquiring section acquires information related to a user operation from an image processing device. An operation status identifying section of an image generating section identifies the contents displayed on the image processing device side at the time when the user operation is performed. A drawing section generates a frame corresponding to the details of the user operation and the contents displayed at the time when the user operation is performed. A discard processing section determines whether or not to discard the data, on the basis of the contents of a provisional frame generated before the detection of the user operation.