Building visual conversational system

The invention discloses a building visual conversational system, which comprises a management device, a floor branch device, an indoor unit, a staircase unit and at least one networking isolator, wherein the floor branch device is in signal connection with the indoor unit; the networking isolator is in signal connection among the floor branch device, the management device and the staircase unit through a twisted-pair cable; a differential signal driver module used for converting a composite video broadcast signal to a differential signal is arranged in the staircase unit; a differential signal processing module used for converting the differential signal to the composite video broadcast signal is arranged in the floor branch device; and a self-adaptive equalization module is arranged in the networking isolator and used for performing the self-adaptive processing on the differential signal sent from the staircase unit and then transmitting the signal to the management device. The building visual conversational