The invention relates to a ship lifting machine operation controlling method and device, especially a hydraulic floating type ship lifting machine operation docking controlling method and device, The invention is characterized in that: an ancillary filling valve and an ancillary emptying valve are respectively connected in parallel with the main filling valve and the main emptying valve of the hydraulic floating type ship lifting machine water carriage system pipeline; the main filling valve and the main emptying valve are larger than the corresponding ancillary filling valve and ancillary emptying valve; regulating the opening of the small sized ancillary filling/emptying valve can control the ship lift chamber to enter and exit from the chamber pool; the big sized main filling/emptying valve is only opened before the ship lift chamber enters or after the ship lift chamber exits completely to increase the running speed of the ship lift chamber in air.