A tag with a built-in smart sensor is studied. The smart tag can monitor the freshness of meat by detecting changes in the composition of the atmosphere in the packaging container, and has the advantages of real-time, convenience, speed, and high accuracy. Realize the real-time monitoring of meat quality changes during storage, transportation and sales, thereby improving the safety of eating. Through the collection and collation of the literature, the article first briefly summarized the corruption mechanism of meat, pointed out that volatile biogenic amines were the main index of meat corruption, and then summed up the methods of using traditional techniques to detect meat freshness. Finally, it mainly discussed the detection of meat freshness by intelligent sensors, and introduced the research progress of intelligent indicator tags from the perspectives of synthetic materials, natural materials and fluorescent materials. The research and application prospect of this technology were summarized and prospected. In conclusion, the intelligent indication label has a great application prospect in the detection of meat freshness, which can realize the seamless link of meat logistics nodes, provide meat quality information in a short time, and effectively solve people's livelihood problems.