1. A hand-held mobile apparatus, comprising: a network communication module for linking to an online community server via a network system; and the online community server having a web image stored therein; a storage unit for storing a local image therein; a comparison module for comparing data of the web image with data of the local image and determining whether the web image data matches the local image data; a recognition module being connected to the comparison module for receiving the web image when the comparison module determines the web image data is different from the local image data, and for determining whether the web image is of a first image type or a second image type; a processing unit being connected to the network communication module, the storage unit, the comparison module and the recognition module; in the case the recognition module determining that the web image is of the first image type, the processing unit downloading from the online community server via the network communication module the web image in a smallest possible image size thereof; or in the case the recognition module determining that the web image is of the second image type, the processing unit downloading from the online community server via the network communication module the web image in an image size matching a screen resolution of the hand-held mobile apparatus; wherein the downloaded web image is used as the local image and stored in the storage unit; and a display unit being connected to the processing unit for displaying the local image transmitted thereto by the processing unit.