The work aims to review the principle, characteristics and application of gas indicator smart label and na-nometer smart label technology in food packaging The working principle and application research of smart labels, such as freshness indicator label, maturity indicator label, leak indicator label, radio frequency identification label and nanometer integrated indicator in gas indicator smart label, as well as the development trend of smart labels were introduced in detail. Smart label technology has attracted wide attention in food packaging industry. Smart labels play an important role in promoting the intelligent development of food packaging, maintaining food safety, strengthening packaging protection, improving quality monitoring and so on. It is the main direction of food packaging development in the future.