Book excerpt: This two-volume set (CCIS 1137 and CCIS 1138) constitutes the proceedings of the Third International Conference on Cyberspace Data and Intelligence, Cyber DI 2019, and the International Conference on Cyber-Living, Cyber-Syndrome, and Cyber-Health, CyberLife 2019, held under the umbrella of the 2019 Cyberspace Congress, held in Beijing, China, in December 2019. The 64 full papers presented together with 18 short papers were carefully reviewed and selected from 160 submissions. The papers are grouped in the following topics: Cyber Data, Information and Knowledge; Cyber and Cyber-enabled Intelligence; Communication and Computing; Cyber Philosophy, Cyberlogic and Cyber Science; and Cyber Health and Smart Healthcare.