To implement the national innovation-driven development strategy, achieve the development goal of transforming traditional industries with technology and promoting industrial upgrading, and enhance the independent innovation level of infrared millimeter wave, terahertz and space science and technology application industries in China, The Third International Conference on Earth & Space: from Infrared to Terahertz  (ESIT2024), organized by Shanghai Institute of Technical Physics, Chinese Academy of Sciences; Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences and Editorial Office of Journal of Infrared and Millimeter Waves, will be held in Hangzhou, China, from September 20 to 22, 2024. At that time, well-known experts and scholars from home and abroad will be invited to give academic talks and carry out academic exchanges and discussions.