The invention is applicable to the field of mobile terminals, and provides a method, a
system and a mobile terminal for realizing one-handed mobile
terminal operation. The method comprises the following steps of: receiving a command for starting a one-handed
operation mode; according to the command, zooming out a screen to a preset size; and displaying a reduced screen
thumbnail on an original screen in a
picture in picture mode. Through starting the one-handed
operation mode, the screen
thumbnail which is smaller than the original screen is displayed on the original screen of the mobile terminal in the
picture in picture mode. The operation on the
thumbnail is mapped to the operation on a
large screen, so that the operation on the thumbnail equals to the operation on the
large screen, and moreover, the operation on the screen except for the thumbnail can also be responded. The operation of the
large screen is not influenced on the basis of controlling the big screen through the thumbnail; and thus, a one-handed operation function of a large-screen
mobile phone is realized, good experiences are brought to users, one hands of the users can also be released to do other things, so that conveniences are brought to the users. The one-handed
operation mode cannot influence the displaying effect of the large-screen
mobile phone, and cool experiences are realized in the way that small-scope operation controls large-scope display.