2019 Blockchain and Internet of Things Conference (BIOTC 2019) aims to provide a forum for researchers, practitioners, and professionals from the industry, academia and government to discourse on research and development, professional practice in Blockchain and Internet of Thing. BIOTC 2019 is the workshop of IECC 2019 and it will be held in Okinawa, Japan during July 7-9, 2019 together with the main conference. Welcome scholars and researchers working in the field of Blockchain and Internet of Things from all over the world to attend the conference and share your experiences and lessons with other enthusiasts, and develop opportunities for cooperation.