An automatic press-molded article manufacturing system using a double robot line for a tandem press line, comprising: a plurality of destackers positioned apart from each other at a predetermined distance and loaded with multiple raw materials; a pair of raw material transfer robots transferring the raw materials loaded on the destackers while holding the raw materials by suction, the raw material transfer robots spaced apart from each other; a plurality of positioners positioned between the raw material transfer robots to position the raw materials transferred by the raw material transfer robots; a pair of raw material supply robots positioned apart from each other behind the raw material transfer robots and alternately moving to supply the raw materials from the positioners to a press while holding the raw materials by suction; a plurality of presses sequentially positioned behind the raw material supply robots and press-molding the raw materials received from the raw material supply robots into press-molded articles; a plurality of pairs of press-molded article supply robots, each pair of press-molded article supply robots positioned between a first press and a second press of the plurality of presses and alternately moving to supply the press-molded articles from the first press to the second press, wherein the press-molded article supply robots in each pair is spaced apart from each other; a pair of product carrying-out robots positioned apart from each other behind a rearmost press of the presses and alternately moving to carry out final press-molded articles; and a controller configured to control the raw material transfer robots, the raw material supply robots, the presses, the press-molded article supply robots, and product carrying-out robots. a plurality of destackers positioned apart from each other at a predetermined distance and loaded with multiple raw materials; a pair of raw material transfer robots transferring the raw materials loaded on the destackers while holding the raw materials by suction, the raw material transfer robots spaced apart from each other; a plurality of positioners positioned between the raw material transfer robots to position the raw materials transferred by the raw material transfer robots; a pair of raw material supply robots positioned apart from each other behind the raw material transfer robots and alternately moving to supply the raw materials from the positioners to a press while holding the raw materials by suction; a plurality of presses sequentially positioned behind the raw material supply robots and press-molding the raw materials received from the raw material supply robots into press-molded articles; a plurality of pairs of press-molded article supply robots, each pair of press-molded article supply robots positioned between a first press and a second press of the plurality of presses and alternately moving to supply the press-molded articles from the first press to the second press, wherein the press-molded article supply robots in each pair is spaced apart from each other; a pair of product carrying-out robots positioned apart from each other behind a rearmost press of the presses and alternately moving to carry out final press-molded articles; and a controller configured to control the raw material transfer robots, the raw material supply robots, the presses, the press-molded article supply robots, and product carrying-out robots.