The invention discloses a charging and ash scooping up all-in-one machine in front of a smelting furnace and a work method thereof. The machine comprises a charging vehicle, a charging box, an ash scooping up arm and a slagging-off arm; the charging vehicle comprises a first base, a second base, a third base and a charging arm, the second base is rotatably connected above the first base, the thirdbase is in rolling connection to the position above the second base, one end of the charging arm is rotatably connected with the third base, the end of the charging arm is provided with a first hook,the side, opposite to the charging vehicle, of the charging box is provided with a first hanging shaft, the side, opposite to the charging vehicle, of the ash scooping up arm is provided with a second hanging shaft, the side, opposite to the charging box, of the slagging-off arm is provided with a third hanging shaft, and the first hook can be in hooked connection with the first hanging shaft, the second hanging shaft and the third hanging shaft. According to the charging and ash scooping up all-in-one machine in front of the smelting furnace and the work method thereof, manpower can be replaced for carrying out processes of charging, ash scooping up or slagging off on the interior of the smelting furnace.