An image processing device is connected to a device management apparatus via a network and includes device information in accordance with the Common Information Model CIM. In the image processing device, a first transform part transforms, when a query described in a general-purpose language to include a request of data handling of device information with respect to jobs is received, CIM objects, generated from the device information with respect to the jobs, into XML data items. A combining part combines the XML data items into XML data and generates the combined XML data. An extracting part extracts an XML data item associated with the request from the combined XML data. A second transform part transforms the XML data item into a CIM object. The data handling of the CIM object is performed and a result of the data handling is transmitted.