6. A sign language image input device, comprising: a processor; a database, a plurality of sign language images stored in the database, each of the sign language images corresponding to a code combination; and a keyboard having a plurality of key blocks, generating at least a key combination via pressing the key blocks of the keyboard, wherein the key blocks comprises a plurality of number keys, position keys and hand action keys, the key combination be set according to at least one number key, position key and/or hand action key of the key blocks, wherein the number key is defined as a number of fingers in an input sign language image, the position key is defined as a position of a human organ that is pointed at by the fingers in the input sign language image, and the hand action key is defined as a movement of the fingers or hands in the input sign language image; wherein the processor further comprises: a searching module, configured to receive the key combination and compare the key combination with the code combinations in the database; and a sign language image output module, configured to output the input sign language image according to a comparison result of the key combination and the code combinations.
6. A sign language image input device, comprising: a processor; a database, a plurality of sign language images stored in the database, each of the sign language images corresponding to a code combination; and a keyboard having a plurality of key blocks, generating at least a key combination via pressing the key blocks of the keyboard, wherein the key blocks comprises a plurality of number keys, position keys and hand action keys, the key combination be set according to at least one number key, position key and/or hand action key of the key blocks, wherein the number key is defined as a number of fingers in an input sign language image, the position key is defined as a position of a human organ that is pointed at by the fingers in the input sign language image, and the hand action key is defined as a movement of the fingers or hands in the input sign language image; wherein the processor further comprises: a searching module, configured to receive the key combination and compare the key combination with the code combinations in the database; and a sign language image output module, configured to output the input sign language image according to a comparison result of the key combination and the code combinations. 7. The sign language image input device according to claim 6 , wherein the sign language image output module further comprises: a sign language image candidate output module, providing a plurality of sign language image candidates according to the comparison result of the key combination and the code combinations, wherein the sign language image candidates are the sign language images corresponding to the code combination and the similarity between the code combination and the key combination are qualified; and a selection module, selecting one of the sign language image candidates according to a selection order as the input sign language image.