A parcel sorting system 100 comprising: a track 110 driven in a cross-belt type; a loading line 120 loading and conveying parcels to be sorted to the track 110; a loading line induction 125 putting parcels supplied by the loading line 120 to the track 110; carriers 112 disposed on the track 110 and moved by operation of the track 110 with the parcels thereon which have been put in; a plurality of chutes 140 disposed along the track 110 so that the parcels on the track 110 are discharged by the same destination groups; characterized in the system comprising: a 5-face image processor 150 disposed at a side of the track 110, reading out parcel information marked on the top and sides of parcels, and sensing the positions of parcels on the track 110; a feedback line 160 putting parcels not read out by the 5-face image processor 150 back to the track; and a controller determining chutes 140 for discharging parcels using the parcel information transmitted from the 5-face image processor 150, wherein the track 110 includes a pair of first and second tracks 1 10a, 1 10b, which handle parcels for parcel-dense areas and parcels for other areas, and the parcel sorting system further comprises: a shortcut line 180 connecting the first and second tracks 110a, 110b so that parcels, which are not parcels for a corresponding area and have been put in wrong, can be conveyed to a corresponding track 110; and a shortcut line induction 185 putting parcels supplied by the shortcut line to the track 110. a track 110 driven in a cross-belt type; a loading line 120 loading and conveying parcels to be sorted to the track 110; a loading line induction 125 putting parcels supplied by the loading line 120 to the track 110; carriers 112 disposed on the track 110 and moved by operation of the track 110 with the parcels thereon which have been put in; a plurality of chutes 140 disposed along the track 110 so that the parcels on the track 110 are discharged by the same destination groups; characterized in the system comprising: a 5-face image processor 150 disposed at a side of the track 110, reading out parcel information marked on the top and sides of parcels, and sensing the positions of parcels on the track 110; a feedback line 160 putting parcels not read out by the 5-face image processor 150 back to the track; and a controller determining chutes 140 for discharging parcels using the parcel information transmitted from the 5-face image processor 150, wherein the track 110 includes a pair of first and second tracks 1 10a, 1 10b, which handle parcels for parcel-dense areas and parcels for other areas, and the parcel sorting system further comprises: a shortcut line 180 connecting the first and second tracks 110a, 110b so that parcels, which are not parcels for a corresponding area and have been put in wrong, can be conveyed to a corresponding track 110; and a shortcut line induction 185 putting parcels supplied by the shortcut line to the track 110. a 5-face image processor 150 disposed at a side of the track 110, reading out parcel information marked on the top and sides of parcels, and sensing the positions of parcels on the track 110; a feedback line 160 putting parcels not read out by the 5-face image processor 150 back to the track; and a controller determining chutes 140 for discharging parcels using the parcel information transmitted from the 5-face image processor 150, wherein the track 110 includes a pair of first and second tracks 1 10a, 1 10b, which handle parcels for parcel-dense areas and parcels for other areas, and the parcel sorting system further comprises: a shortcut line 180 connecting the first and second tracks 110a, 110b so that parcels, which are not parcels for a corresponding area and have been put in wrong, can be conveyed to a corresponding track 110; and a shortcut line induction 185 putting parcels supplied by the shortcut line to the track 110. a shortcut line 180 connecting the first and second tracks 110a, 110b so that parcels, which are not parcels for a corresponding area and have been put in wrong, can be conveyed to a corresponding track 110; and a shortcut line induction 185 putting parcels supplied by the shortcut line to the track 110.