With the increase of the pace of life， under the influence of the new consumption mode and regular epidemic prevention and control， prefabricated food with rich varieties， convenient has gradually came into demand in the market. The prefabricated food in China can not only realize the standardized production of catering industry， reduce costs and increase efficiency， but also improve the convenience of consumers' cooking. The quality， freshness and food safety risks of prepared food are widely concerned by researchers and the public. This paper discusses the recent advance and challenges of field detection equipment for quality monitoring and smart label of prefabricated food， and traceability technology based on blockchain and the Internet of Things. Finally， the author made a outlook on the future development direction.