This book focuses on the convergence of energy, communication and computation in the beyond 5G (B5G) cellular Internet of Things (IoT). It addresses both theory and techniques, with more weight placed on the latter. This is achieved by providing in-depth studies on a number of major topics such as wireless power transfer, non-orthogonal multiple access, massive multiple-input multiple-output, and over-air computation. In turn, four typical convergence scenarios are studied in detail: the convergence of energy and communication, convergence of energy and computation, convergence of communication and computation, and convergence of energy, communication and computation. The comprehensive and systematic coverage of key techniques in the convergence of energy, communication and computation in the B5G cellular IoT is one of the book's major features, making it particularly well suited for readers who are interested in learning about practical solutions in B5G wireless networks. Accordingly, the book offers a valuable resource for researchers, engineers, and graduate students in the fields of information engineering, telecommunications engineering, computer engineering, etc.