The invention provides a human-computer interface display system running across the rail transit line and method thereof, wherein the system comprises a host processing module, a data processing module and a display module. The data processing module is used for building up a data processing sheet, receiving the user-triggered operational data and the data information sent from the host processing module. Then the data information and the user-triggered operational data message are recorded on the data processing sheet. The host processing module is used for receiving the switching interface request and the data information, sending the data information to the data processing module, attaining the configuration data sheet needing switching according to the switching interface request and sending the configuration data sheet needing switching to the display module, wherein the data information gotten after being switched is recorded on the configuration data sheet needing switching. The display module is used for displaying the configuration data sheet needing switching, processing the antecedent configuration data sheet needing switching according to different line demands, completing changing interface and achieving the goal of decreasing operating costs.