The conference committee welcome you to attend the 3rd International Conference on Catalysis, Chemical Science and Technology (ICCST). The congress will be held during Dec. 3rd-5th, 2025 in Singapore, with hybrid format. ICCST 2025 includes plenary forum, 14 breakout sessions, as well as poster exhibition in the three-day scientific program. The main topics include Organic Synthesis and Chemistry, Metallic Chemistry and Metallic Catalysis, Electrocatalysis & Electrochemistry, Cutting-edge research of Catalysis, Green and Sustainable Chemistry, etc. ICCST 2025 brings together the best scientists from universities, research institutes and the materials industry worldwide to share exciting results and to build new collaborations. Great ideas and top discoveries from participants will help develop novel aspects of chemistry development. We hope you can join your peers in a highly interesting and engaging hybrid event with online and offline. Your presence and deliberation will make this congress remarkably successful.