Automatic adjusting mechanism, system and method for carrying liquid crystal panels with different sizes

The invention provides an automatic adjusting mechanism for carrying liquid crystal display panels of different sizes. The automatic adjusting mechanism comprises a first supporting frame and a second supporting frame, the driving device is used for driving the first support frame and the second support frame to be staggered up and down; the suckers are uniformly distributed at the bottoms of the first support frame and the second support frame; and the adjusting device is arranged on the first supporting frame or the second supporting frame. According to the automatic adjusting mechanism for carrying the liquid crystal display panels of different sizes, the first supporting frame and the second supporting frame which are nested are staggered up and down to change the suction area of the bottom suction cup, and the first supporting frame and the second supporting frame are driven by the driving device to be switched between the up-down staggered state and the flush state; meanwhile, the height difference of t