This dataset represents the construction, equipment installation, and corresponding recycling and disposal associated with grid connection of offshore wind power per unit of electricity, including aspects related to offshore substations and submarine cable laying, but excludes onshore control centers. It is assumed that the grid connection infrastructure for each wind farm primarily consists of one offshore substation and 35 kV submarine cables. In this phase, the materials consumed include concrete, rebar, steel, sacrificial aluminum alloy anodes, rubber fenders, etc., while the energy consumption mainly involves diesel, water, and other resources used during construction and installation.For the dismantling and decommissioning of the foundation, it is assumed that metal materials such as reinforcing steel, steel, iron, aluminum, and copper, as well as electronic components, have a 90% recycling rate. Resins, rubber, and plastics are disposed of through incineration, while other materials are landfilled. The data are primarily derived from publicly available literature and empirical values.