The invention discloses an automatic meal delivery system for themed restaurants, in particular to a system capable of providing themed decorations in different time-and-space backgrounds in the past and the future while delivering meals automatically. The system comprises an order unit, a multifunctional delivery platform, at least one conveying belt and a plurality of decorating and delivering components. The multifunctional delivery platform extends from a kitchen to sides of dinner tables; the conveying belts are arranged on the delivery platform to deliver meals. When in meal delivery, by the conveying belts and the decorating and delivering components, the meals can be moved to the sides of the dinner tables for eating. The decorating and delivering components are designed with various themes for customers to choice, for example, the theme of education in Father's day or Mother's day, the theme of future science fiction combined with universe interstellar scenes, or the theme of displaying landscapes of various countries, or the like, and thus, on the premise that the basic physiological needs of the customers are met, special experiences and surprises different from those of other restaurants can be brought to the customers during meal delivery, and good education effect to children in growth can also be achieved.