The invention discloses an offshore wind power operation and maintenance intelligent management platform and method, and the platform comprises hardware equipment and a software application system, and the hardware equipment comprises a data collection module, a data transmission module, a data processing module, and a display module; the software application system comprises platform end software, mobile end software, server software, transmission software and software of each data acquisition device of the data acquisition module. According to the offshore wind power operation and maintenance intelligent management platform and method, a whole set of platform combining hardware equipment and a software application system is adopted, on-site monitoring and data acquisition are conducted through the hardware equipment, statistics, fusion, analysis and processing are conducted on data through the software platform, risk early warning and state evaluation are conducted according to analysis and processing results, a prediction scheme is provided, and a smart operation decision is output; the platform supports multi-terminal cooperation of a computer terminal, a mobile terminal and the like, and intelligent and refined management of operation and maintenance of the offshore wind power plant is achieved.