The invention discloses a dish identification method and system based on Dish-YOLO, and belongs to the field of image identification. The system comprises three parts, namely a dish identification module, an auxiliary settlement and data set updating module and a model training and cloud storage module, and comprises the following steps: firstly, carrying out dish region positioning on a dinner plate picture and dish identification on a single dish picture through the dish identification module; the dish identification result and the pricing result are manually audited through an auxiliary settlement and data set updating module, and a cloud training data set is updated; and finally, cloud training is performed on the dish identification model through a model training and cloud storage module, and the dish identification model is synchronously updated to a local end of a restaurant. According to the invention, through a dish identification method of first positioning and then identification, in combination with auxiliary settlement and cloud training, deep fusion of a traditional manual cashier settlement mode and an automatic dish identification settlement mode is realized, so that the intelligent dish identification settlement system has stronger practicability and fault tolerance.