This paper prescribes a movable voltage-variable & frequency-variable on-shore power supply system which successfully provides on-shore power for CSCL“New Fuzhou”Vessel at Waigaoqiao Terminal Phase II in Shanghai Port. The high-voltage power (10 kV/50 Hz/2 000 kVA) for the quay cranes is used as the power input of the supply system(450 V/60 Hz) for the berthing vessels after the frequency and voltage are converted. This system is flexible and has a positive effect on energy-saving and emission reduction. Besides, there’s no need of civil reconstruction to the container terminals, thus it is adaptable to the busy ports in China.