Flexible electronics, an emerging technology, integrates active and passive functions in devices, driving advancements in healthcare, IoT, and industrial fields. Flexible temperature sensors, which can be attached to human skin or curved surfaces for continuous temperature measurement, have gained significant attention for applications in disease prediction, health monitoring, robotic signal sensing, and curved surface temperature measurement. The article reviews the latest developments in flexible temperature sensors, focusing on sensitive materials, working mechanisms, preparation processes, and applications. It highlights the challenges and prospects for future research in this field. Flexible electronics, a cutting-edge technology, integrates active and passive functions, driving rapid advancements in healthcare, IoT, and industrial applications. Flexible temperature sensors, which can be attached to human skin or curved surfaces for continuous temperature measurement, have attracted much attention due to their potential in disease prediction, health monitoring, robotic signal sensing, and curved surface temperature measurement. The article reviews the latest developments in flexible temperature sensors, discussing sensitive materials, working mechanisms, preparation processes, and applications. It also presents conclusions based on the latest advancements and identifies challenges and future prospects. Flexible temperature sensors consist of temperature-sensitive materials, flexible substrates, electrodes, and encapsulation layers. Temperature-sensitive materials, such as carbon nanomaterials, conductive polymers, metals, and metal oxides, are crucial for their mechanical and electrical properties. Flexible substrates, including resins, rubber-based polymers, and hydrogels, provide flexibility and support the sensitive layers. The article reviews the properties and applications of these materials, emphasizing their role in achieving high sensitivity, precision, and response time in flexible temperature sensors. The article discusses the development of flexible temperature sensors, focusing on the materials used, their sensing mechanisms, and preparation methods. It highlights the importance of carbon nanomaterials, conductive polymers, metals, and metal oxides as temperature-sensitive materials. The article also explores the challenges in achieving high sensitivity, flexibility, and stability in flexible temperature sensors. Finally, it presents the potential applications of flexible temperature sensors in various fields, including disease prediction, health monitoring, and industrial production.Flexible electronics, an emerging technology, integrates active and passive functions in devices, driving advancements in healthcare, IoT, and industrial fields. Flexible temperature sensors, which can be attached to human skin or curved surfaces for continuous temperature measurement, have gained significant attention for applications in disease prediction, health monitoring, robotic signal sensing, and curved surface temperature measurement. The article reviews the latest developments in flexible temperature sensors, focusing on sensitive materials, working mechanisms, preparation processes, and applications. It highlights the challenges and prospects for future research in this field. Flexible electronics, a cutting-edge technology, integrates active and passive functions, driving rapid advancements in healthcare, IoT, and industrial applications. Flexible temperature sensors, which can be attached to human skin or curved surfaces for continuous temperature measurement, have attracted much attention due to their potential in disease prediction, health monitoring, robotic signal sensing, and curved surface temperature measurement. The article reviews the latest developments in flexible temperature sensors, discussing sensitive materials, working mechanisms, preparation processes, and applications. It also presents conclusions based on the latest advancements and identifies challenges and future prospects. Flexible temperature sensors consist of temperature-sensitive materials, flexible substrates, electrodes, and encapsulation layers. Temperature-sensitive materials, such as carbon nanomaterials, conductive polymers, metals, and metal oxides, are crucial for their mechanical and electrical properties. Flexible substrates, including resins, rubber-based polymers, and hydrogels, provide flexibility and support the sensitive layers. The article reviews the properties and applications of these materials, emphasizing their role in achieving high sensitivity, precision, and response time in flexible temperature sensors. The article discusses the development of flexible temperature sensors, focusing on the materials used, their sensing mechanisms, and preparation methods. It highlights the importance of carbon nanomaterials, conductive polymers, metals, and metal oxides as temperature-sensitive materials. The article also explores the challenges in achieving high sensitivity, flexibility, and stability in flexible temperature sensors. Finally, it presents the potential applications of flexible temperature sensors in various fields, including disease prediction, health monitoring, and industrial production.