CIB World Building Congress 2019 (CIB WBC 2019) was held in Hong Kong from 17 to 21 June 2019. The Congress was jointly hosted by the International Council for Research and Innovation in Building and Construction (CIB) and the Hong Kong Polytechnic University’s Department of Building and Real Estate (BRE).Led by the theme ‘Constructing Smart Cities’, the CIB WBC 2019 provided a platform to explore the smart city development and its role in society. This triennial congress had focus on 8 sub-themes:Smart Utilities and Facilities Management, Smart Governance, Policy and Economy, Smart Environment, Smart Service, Smart Buildings and Infrastructure, Smart Transportation and Mobility, Smart People and Living, Smart Planning, Design and Construction. The researchers and professors from the centre presented original research articles in the conference.