This invention aims to improve the response characteristics of screen display in an information (image) processing apparatus capable of displaying a screen based on screen data provided from a Web server. The image processing apparatus transmits cache data, which is stored in association with content data acquired from a Web server, to a cache management server together with a user ID in logout of a user. The cache management server stores the cache data, which is received from the image processing apparatus, in association with the user ID. When the user then logs in to any image processing apparatus, the cache management server retrieves the cache data, which is stored in association with the user ID transmitted from the image processing apparatus, and transmits the retrieved cache data to the image processing apparatus.