8. An electronic device, comprising: a storage unit, storing a service database recording services for users and including at least one user's information, each user's information comprising a mapping relationship between a plurality of images of facial expressions on the user's face, a plurality of facial expressions of the user, and a plurality of services; an input unit, configured for activating an offering service function of the electronic device in response to a user's operation; a camera unit, configured for capturing the images of real-time facial expressions of the user; an image processing module, configured for extracting the features of each facial expressions of the user; an identification module, configured for comparing the extracted features of the real-time facial expressions with the features of the facial expressions in the images of the user stored in the service database, so as to find a matching feature or the closest matching feature in the images of the user stored in the service database, and determining the type of the facial expression and the service corresponding thereto in the service database; and a service control module, configured for activating and providing the determined service.
8. An electronic device, comprising: a storage unit, storing a service database recording services for users and including at least one user's information, each user's information comprising a mapping relationship between a plurality of images of facial expressions on the user's face, a plurality of facial expressions of the user, and a plurality of services; an input unit, configured for activating an offering service function of the electronic device in response to a user's operation; a camera unit, configured for capturing the images of real-time facial expressions of the user; an image processing module, configured for extracting the features of each facial expressions of the user; an identification module, configured for comparing the extracted features of the real-time facial expressions with the features of the facial expressions in the images of the user stored in the service database, so as to find a matching feature or the closest matching feature in the images of the user stored in the service database, and determining the type of the facial expression and the service corresponding thereto in the service database; and a service control module, configured for activating and providing the determined service. 9. The electronic device as described in claim 8 , wherein the camera unit is further configured for storing the captured images of the face of the user in a buffer of the electronic device, and the service control module is further configured for determining the hardware and associated software required for the determined service.