Despite these challenges, nano-thermometry possesses great potentialss for highly sensitive, non-contact temperature measurements with sub-microscopic resolution towards in-depth understanding on optimized catalysis. Further technological advances of nano-thermometry in photothermal catalysis could focus on developing generalized, high precision and in-situ temperature measurement techniques under working conditions to clearly distinguish between thermal and non-thermal contributions, and to deepen understandings on photothermal catalytic reaction mechanisms, which could, in turn, provide important design principles for efficient catalytic systems. In addition, future nano-thermometry could be more integrated and intelligent, incorporating real-time big-data processing and principal-component analysis systems to carry out more accurate and efficient temperature measurement. Finally, the development of nano-thermometry could be combined with multi-spectroscopy technology to provide more comprehensive solutions for catalytic reactions. These developments will help significantly improve the accuracy and reliability of temperature measurement for catalytic reactions.