Image processing device, and method and system for controlling image processing device

A method of controlling an image processing apparatus, the method comprising:

• receiving rating information with respect to a plurality of content from an external apparatus in a storage of the image processing apparatus;
• if a user inputs a rating to a first content of the plurality of contents, determining a rating of a second content of the plurality of contents based on the rating of the first content input by the user, the second content having a relation to the first content;
• transmitting information of the rating of the first content and the determined rating of the second content to the external apparatus;
• and
• displaying recommendation information about the content based on the rating information stored in the storage in response to a user's request.

A server comprising:

• a communicator configured to communicate with a plurality of image processing apparatuses;
• a storage;
• and
• a processor configured to store rating information with respect to a plurality of contents in the storage based on ratings by one or more users to one of more contents, the ratings received from the plurality of image processing apparatuses, and in response to a request from one of the plurality of image processing apparatuses, to transmit the rating information stored in the storage to corresponding image processing apparatus through the communicator,
• wherein the processor is configured, based on a relation between a first content where a rating is input by a user and a second content where a rating is not input by the user, to determine the rating of the second content.