With the rapid development of information technology, electronic communication and computer network security have become indispensable and important components of modern society. In order to promote academic exchange and technological innovation in this field, the International Conference on Electronic Communication and Computer Network Security in 2025 will be held in Lijiang City, Yunnan Province, China. The purpose of this conference is to gather top scientists, engineers, researchers, and industry experts from around the world to discuss the latest developments and future trends in the field of electronic communication and network security. The conference has a wide range of topics, including but not limited to: wireless communication technology, 5G/6G network architecture, Internet of Things security, cloud computing and edge computing security, data privacy protection, encryption algorithms and their applications, network attack and defense strategies, etc. The conference pays special attention to the impact of emerging technologies on existing systems and how to enhance the security and reliability of electronic communication and computer networks through innovative methods. This conference will provide various forms of communication platforms, including keynote speeches, thematic seminars, paper presentations, and technical exhibitions. Attendees can not only learn about the latest research achievements and technological breakthroughs, but also have in-depth exchanges and establish cooperative relationships with professionals from all over the world. In addition, the conference will also establish multiple awards such as the "Best Paper Award" and the "Young Scholar Award" to encourage and support young researchers to make contributions in this field. Lijiang, as an ancient city that combines natural beauty and rich culture, provides a unique background for this international conference. Here, participants can not only immerse themselves in the exchange of knowledge and technology, but also experience the unique cultural atmosphere and magnificent scenery of Lijiang. We cordially invite professionals engaged in research on electronic communication and computer network security from around the world to actively participate and discuss current challenges and future solutions together. Let's gather together in Lijiang, share this feast of technology and wisdom, work together to promote the development of electronic communication and network security technology, and embrace a more secure and reliable digital future.