An electronic device includes a touch screen, a storage unit storing a plurality of electronic files and relationships between display contacts and functions, and a processing unit. The touch screen produces contact signals in response to user's display contacts. The processing unit detects the user's display contacts according to the contact signals, determines a function corresponding to the user's display contact according to the relationships, and determines the function is a data transmitting function when the display contact is a pre-defined corresponding contact. The processing unit further determines an electronic file displayed on the touch screen and transmits the determined electronic file, when determining the function is the data transmitting function.