The catering plays an important role in China's economy and society. With the development of society and the application of artificial intelligence, catering is evolving in the direction of diversification, specialization and intelligence. The development of China's catering industry was reviewed. The connotation and extension of Smart Catering 4.0 and the trend of new food science and technology and artificial intelligence technology utilized in this field were systematically analyzed. Computer vision combined with deep learning algorithms achieved the quality grading of raw materials. Digital twin technology not only can covert thousands of electronic recipes into process parameters, but also can simulate the cooking skills of culinary masters, put Chinese unique cooking techniques into robot cooking. The application of collaborative filtering recommendation algorithms, natural language processing, and face recognition technologies can quickly identify the customer and make personalized recommendations. This article summarized the current status and main technologies of smart catering, and proposed future directions, namely, focusing on health, basing on deliciousness, and centering on culture, with the aim of providing reference for the further development of the catering industry.