The “Hong Kong Secondary Student Space Station Popular Science Payload and Science Experiment Design Challenge” is co-organised by the Education Bureau of the Hong Kong Special Administrative Region Government, the Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences, and the Hong Kong University of Science and Technology, in support of the Department of Educational, Scientific and Technological Affairs, the Liaison Office of the Central People’s Government in the Hong Kong Special Administrative Region, along with partner organisations including the Beijing-Hong Kong Academic Exchange Centre, the Hong Kong Federation of Education Workers, and the Education Convergence.The challenge aims to promote aerospace education, deepen students' understanding of the country's achievements in the aerospace area, and strengthen their confidence in science and technology. Award-winning and selected proposals have opportunities to be realised and developed into final products, and would be recommended to the space station space mission and Space Station Hong Kong Popular Science Satellite Project, to commence in 2026.