“In recent years, fluorescence temperature measurement technology has attracted much attention in the field of non-contact temperature measurement. The temperature measurement technology based on fluorescence intensity ratio has shown great potential for application due to its strong anti-interference ability and good self calibration characteristics. However, its core physical mechanism is limited by the difficulty of achieving both "high sensitivity" and "wide temperature range". In the past decade, researchers have made significant progress in innovating temperature measurement mechanisms, opening up new directions for breaking through technological bottlenecks.”