The Practice Guide aims to provide a list of best practices, with references to local conditions of Hong Kong, including climate and ecosystems, and international best practices. The Practice Guide is applicable to all data centres, including existing, newly built and converted data centres. It covers the whole life cycle of the data centre including Design and Construction, Procurement, Management, Operation and Maintenance, as well as Disposal.

The best practices covered by the Practice Guide are categorised into ten major areas, including General Aspects, Cooling System, Power System, Monitoring and Managing Energy Efficiency, IT Equipment Deployment, IT Application System and IT Service Deployment, Telecommunications & Network Cabling, Green Construction, Management and Maintenance, and Green Disposal, to assist data centre industry practitioners, as well as government bureaux and departments, in identifying and implementing measures to improve the energy efficiency and environmental performance of their data centres.