The invention relates to a transport installation ship of a wind generation set and a ship transport and installation method for the wind generation set. The transport installation ship comprises a ship body with a longitudinal axis, two supports fixed on both sides of the longitudinal axis of the ship body and with bottoms parallel to the longitudinal axis, two platforms located at the equal altitude positions of the inner sides of the middles of the two supports and capable of supporting balance beams which are located above the two platforms, respectively connected with hoisting equipment and an upper hoisting frame and capable of locking a tower of the wind generation set, the upper hoisting frame connected with the bottom of the wind generation set so as to support the wind generation set, two guide rails respectively fixed on top surfaces of the two supports and parallel to the longitudinal axis, the hoisting equipment driving the balance beams to move vertically and moving along the two guide rails so as to drive the balance beams to move along the direction parallel to the longitudinal axis, and shipboard foundation fixed on the ship body on the inner sides of the two supports and connected with the wind generation set. The ship transport and installation method for the wind generation set is capable of improving efficiency of installation of the wind generation set at sea and is less affected by sea conditions.