The dissertation demonstrated movable equipment to realize uninterruptable power supply on-shore connection, i.e. the movable switchgear and mobile synchronizing cabinet, which can unchanging structure of ship power station rather than hugely increase the investment of shore power transformation, and also achieve continuous electricity power supply for domestic vessels berthing on the ports with shore power interface connecting on-shore power, so as to realize environmental protection in port and expenditure savings for the ship. Ship controlling shore power connection system, by means of the movable switchgear and mobile synchronizing cabinet, can achieve paralleling operation between 400 V/ 50 Hz shore power and marine power generator correspondingly, and also transferring the load and paralleling off marine generators, as well as, paralleling accordingly marine generator with the shore power, corresponding transferring load and cut off shore power. Movable equipment for realizing seamless power supply between the port and ship is simple, reliable, convenient, economical and efficient. The dissertation proves that the device is simple, reliable, convenient, economical and efficient.