Abstract: A glass-plate sorting system for sorting glass plates being cut into products having a plurality of quality grades to simultaneously obtain products of desired quality grades. A discriminating-type flaw detector (101) detects the sizes and locations of flaws existing in a glass strip travelling on a line conveyor and transmits flaw data to a control unit (102). The control unit discriminates quality grades of the cut glass plates based on the flaw data. Sorters (110) having lifters (112) and suction conveyors (111) sort products of desired quality grades based on the control by the control unit (102).