This book constitutes the refereed proceedings of the 20th National Conference on Man-Machine Speech Communication, NCMMSC 2025, held in Zhenjiang, China, during October 16-19, 2025.

The 40 papers included in these proceedings were carefully reviewed and selected from 157 submissions. the conference will feature special events such as a Young Scholars Forum, Student Forum, Industry Forum, and Product and Technology Exhibition. Beyond the main program, the conference will also include publicoutreach activities, grant-writing workshops, and several special sessions.