The utility model relates to a system is seen off to electric energy for offshore wind farm. The utility model aims at providing an economical rationality, the little a system is seen off to electricenergy for offshore wind farm of loss. The utility model provides a: a system is seen off to electric energy for offshore wind farm which characterized in that: it is central with the land centralizedcontrol that sets up in the land to have setting marine booster station at sea, continuous through submarine cable between marine booster station and the land centralized control center, has whereinarranged 2 220kV35kV duplex winding on -load voltage -regulating transformer in the marine booster station, and this 220kV35kV duplex winding on -load voltage -regulating transformer's 35kV holds themarine fan of circuit connection, 220kV end connection submarine cable, intracardiac 220kV step -down change, dynamic reactive power compensation device, the controlled protection device soft breeze electric field metering device of being equipped with in the land centralized control. The utility model is suitable for a renewable energy trade offshore wind power generation field.