The invention discloses a plane turnover multi-point leveling device and method. The plane turnover multi-point leveling device comprises first to twelfth hydraulic supporting legs, first to twelfth displacement sensors, first to twelfth supporting leg force cells, first to fifth horizontal tilt angle sensors, a hydraulic control valve bank, an electrical control display box, a leveling controller, a hydraulic pipeline, a cable network and a platform. The first to twelfth supporting leg force cells and the first to twelfth displacement sensors are sequentially installed at the movable ends of the fifth to twelfth hydraulic supporting legs respectively. The movable ends of the first to twelfth hydraulic supporting legs are respectively fixed to the lower surface of the platform. According to the plane turnover multi-point leveling device and method, a mechanism can be precisely and efficiently leveled on the premise that the leveling device is safe inherently.