Dish serving and plate collecting device for large restaurant

The invention relates to a dish serving and plate collecting device for a large restaurant. The device comprises a box, a dish serving mechanism, a plate collecting mechanism and a washing mechanism, wherein the inside of the box is divided by a bottom plate at the bottom into an upper dish serving/plate collecting cavity and a lower swill cavity; the inside of the swill cavity of the box is divided by a sieve mesh into an upper residue storage cavity and a lower remaining liquid storage cavity; the dish serving/plate collecting cavity of the box is divided by a vertical partition board assembly into a dish serving chamber and a plate collecting chamber; an upper dish serving window and a lower dish serving window are formed in the side wall of the dish serving chamber of the box; an upper plate collecting window and a lower plate collecting window are formed in the side wall of the plate collecting chamber of the box; the partition board assembly comprises two partition boards, a swill channel is formed betw