The invention discloses an android system based application program function extraction method. The method comprises the steps that
(1) the system waits to receive snapshot instructions during the application program operation;
(2) when the system receives the snapshot instructions, and a snapshot of the current application program function is manufactured and is saved;
(3) the saved snapshot is selected, and the system restores/executes the application program corresponding function according to the saved snapshot content. According to the method, the snapshot of certain function of the application program can be obtained rapidly and saved through a shortcut mode or a shortcut mode, so that the method can be used conveniently and rapidly, and operation defects of set-top boxes using remote controls are offset.