A method loading or unloading a container ship

A method for loading or unloading a container ship, wherein - said container ship is moored on a fixed quay or dock (2); - a U-shaped floating quay (7) composed of at least one pontoon (8,9',9'') is provided along said container ship so as to allow container vehicles (6) to drive around said container ship on a path defined by said fixed quay or dock (2) and said floating quay (7); - free ends of legs (9',9'') of said U-shape are connected to said fixed quay or dock (2); - container vehicles (6) are driven from said fixed quay or dock (2) - via a free end of a leg (9',9'') of said U-shape - onto said floating quay (7) in a direction towards a plurality of container cranes (1) movably mounted on a base (8) of said U-shape for loading containers from said container vehicles (6) onto said container ship or for unloading containers from said container ship onto said container vehicles (6), using hoistening means of said container cranes; - said container vehicles (6) are driven from said floating quay (7) - via a free end of another leg of said U-shape - in a direction away from said container cranes (1) onto said fixed quay or dock (2) for loading containers onto said container vehicles (6) or unloading containers from said container vehicles (6).