2025 5th International Conference on Computer Network Security and Software Engineering (CNSSE 2025) will be held on February 21-23, 2025 in Qingdao. CNSSE 2025 focuses on Computer network security, Software engineering, Signal processing, Program analysis and so on. This conference aims to boost development of the Greater Bay Area, expand channels of international academic exchange in science and technology, build a sharing platform of academic resources, promote scientific innovation on the global scale, improve academic cooperation between China and the outside world, enhance development of IAB (IT, AI, biomedicine) industries. It also aims to encourage exchange of information onresearch frontiers in different fields, connect the most advanced academic resources in China and abroad, turn research results into industrial solutions, bring together talents, technologies and capital to boost development.