The 2021 2nd International Conference on Mobile Computing, Wireless Communications, and Networks will be held on September 24-26, 2021 in Dalian, China. MCWCN 2021 is to bring together innovative academics and industrial experts in the field of Mobile Computing, Wireless Communications, and Networks to a common forum. The primary goal of the conference is to promote research and developmental activities in Mobile Computing, Wireless Communications, and Networks and another goal is to promote scientific information interchange between researchers, developers, engineers, students, and practitioners working all around the world. Every year, the conference will be held to make it an ideal platform for people to share views and experiences in Mobile Computing, Wireless Communications, and Networks, and related areas.