The present invention provides an image processing device which aims for appropriate settings and simplification of printing functions. In a print server, when a print job is received, an application name used in a client terminal is specified from a drawing command of the print job, and standard settings of printing functions provided for each application are read from database files. Thereafter, the standard settings and settings of printing functions of the print job are compared. When the settings are different, after carrying out a warning processing, setting of printing functions based on the standard settings is carried out, and image processing and printing processing based on the set printing functions are executed. In this way, while simplifying settings of printing functions in the client terminal, image processing and printing processing by appropriate printing functions are possible.