PURPOSE: To shorten the working line by reversing and transferring the panel like work received from the upper side with the transferring robot, receiving it at the intermediate step, elavating it, working, then lowering and transferring.

CONSTITUTION: A transferring robot 4 receives the panel like work worked in the horizontal posture with the 1st working device 6 of the 1st station from the upper side, and reverses it and transfers it to the 2nd station. This work is received from the upper side with the elavating and lowering mechanism of the 2nd station 2 at the intermediate step, elavated, worked with the prescribed working, then the work is lowered with the elavating and lowering mechanism and sent to the transferring device 5. Thus, the length of the work working line can be shortened.