This dataset represents the average situation of the on-site construction and installation and the decommissioning and dismantling of a single hot-water heat substation of average scale in China, adopting a plate-type heat exchange unit. The unit heat supply area of this heat substation is 70,000-100,000 m2, and the technical service life is 50 years. A uniform assumption is adopted for the decommissioning and dismantling stage, namely the recovery rate of metal materials, wood and cables is assumed to be 90%, plastic and rubber products are disposed of as non-recyclable waste, and the rest of the waste is disposed of as inert waste. The data are mainly sourced from official publications of engineering design quotas; the data have been screened and standardized, and possess good representativeness, accuracy and applicability.