As a food delivery robot designed for various restaurants and hotels, DECA has modular meal plates, and can conduct smart dish identification. It serves restaurants and hotels with an efficient and hygienic contactless mode of food delivery. DECA is designed with modular meal plates featured by large capacity and low center of gravity. According to actual usage needs, users can increase or decrease modular meal plates freely and conveniently to adjust the number of layers and the height between two layers, thereby maximizing the utilization of vertical space. With the meal plates supported by an innovative dish self-sensing program, DECA can smartly identify the tableware and dishes placed on the plate, and inform users when they pick up their dishes, making the whole process more humanized and automatic. At the same time, DECA is equipped with multiple highly sensitive sensors, allowing for efficient recognition of environment in real time, smart path planing, and sensitive avoidance of people and obstacles. Therefore, DECA fully meets the usage needs in restaurants, hotels and other places with complex environments and large customer flow. Additionally, the design team insists that the styling design of the food delivery robot should avoid being overly quasi-physical and anthropomorphic, so as to avoid interference to the overall spatial layout. Thereby, DECA is designed with simple and regular styling to blend into the spatial layout as an inherent element in various usage scenarios, so that it gains higher applicability in multiple types of spaces. By virtue of its smart advertising display screen, expression interaction mode and many other functional operations, DECA servers users with more intuitive information communication. Accordingly, the overall design language is optimized, and users can enjoy more efficient and easier food delivery service brought by DECA.