Wind farms are considered to be the most promising energy source in the future, and in particular, this applies to the source of electricity. By studying the trend of building and using renewable energy sources, major technological advances in the last 20 years have just wind farms. Opening new wind farms have also contributed to the opening of a large number of new jobs worldwide. Wind farms are becoming adequate for almost every terrain and climatic condition, and it is possible to tighten them even in the tropics but also in the Arctic region. The introduction shows the historical development of wind power plants and the wind-wind characteristics of wind power are described and wind characteristics are described. The following chapters describe the main components of offshore wind power plants and their installation technologies. The advantages and disadvantages of the exploitation of offshore wind power are also mentioned. The costs of building wind power plants and electricity prices were analysed. The problem of corrosion of wind power plants at sea and the means of protection against corrosion are also presented.