1. An interactive system, configured to be operated by a user to control a cursor on a screen, the interactive system comprising: a display configured to show the screen and the cursor which has an initial position on the screen; and a processor configured to receive position information to control a position of the cursor on the screen, wherein upon receiving a first position information corresponding to an initial aiming coordinate of the cursor aimed by the user on the screen, the initial aiming coordinate not mapped to the initial position of the cursor, the processor is configured to calculate, according to the first position information, a relative distance associated with the initial aiming coordinate, reset the cursor, without using the initial aiming coordinate, from the initial position to a predetermined position, and then move the cursor, according to the relative distance, from the predetermined position to a correct position on the screen mapped to the initial aiming coordinate, such that the cursor on the screen is shown to be moved from the initial position not mapped to the initial aiming coordinate to the predetermined position, and then to the correct position mapped to the initial aiming coordinate.