Offshore wind power can provide efficient and clean new energy and is an im-portant strategic support for the transformation of China’s energy structure. However, the planning of its access system does not sufficiently account for the effect of the interaction between multiple stakeholders in an uncertain competitive market environment. Hence, an offshore wind farm integration system planning model considering a multi-agent game is proposed herein, where the characteristics of an offshore wind power integration system with various investment subjects and operating modes are combined and the interests of multiple participants are considered. The access of the integration system method and the investment and operation cooperation mode are optimised to obtain an optimal planning scheme of the offshore wind power integration system, thus providing a reference for the scientific and flexible planning and effective operation management of offshore wind farm integration systems under multi-agent investment and operation.