Abstract: A platform door system is disclosed. The platform door system has: a platform data transmitting element positioned on a platform for transmitting a platform signal; a vehicle information integrating element, positioned on a vehicle adjacent to the platform, for receiving the platform signal and a vehicle signal corresponding to a door opening or closing status of the vehicle door from the vehicle, and for transmitting a platform-vehicle integration signal; and a platform door controlling element, positioned on the platform, for receiving the platform-vehicle integration signal and for opening or closing a platform door in response to the platform-vehicle integration signal to correspond to the opening-or-closing status of the vehicle door.