Floating offshore wind farm installation method and system using semi-submersible crane vessel

A system for installing a floating offshore wind generator using a semi-submersible crane vessel, the system comprising:

• a semi-submersible crane vessel of a barge type in which a crane is installed;
• an auxiliary anchor handling tug supply vessel (AHTS) that tows a jacket and a submarine cable transport barge;
• and
• a submarine cable transport barge that loads a submarine cable inner network and a submarine cable outer network, and is loaded on the semi-submersible crane vessel,
• wherein the semi-submersible crane vessel includes
• an anchor management section that moves after loading an anchor and installs the anchor at the site,
• a hull management section that loads a hull and moors the semi-submersible crane vessel to a quay wall,
• a wind power equipment pre-assembly section that pre-assembles wind power equipment on the hull,
• a control section that tows the hull whose pre-assembly is complete from the quay wall to the site and fixes the anchor and the hull by a mooring line,
• an offshore substation installation section that installs an offshore substation, and
• a submarine cable installation section that installs a submarine cable.