A connection method based on intelligent network controlled call includes triggering communication service to intelligent network service platform by soft interchange device (SID) according to service settings of terminal unit corresponding to called number, connecting call to terminal unit bound with called number by SID according to logon information of terminal unit, down-sending connection message containing a calling number corresponding to calling end to SID by intelligent network service platform if said call is failure and connecting call to terminal unit corresponding to called number by SID according to said connection message. The connection system for realizing said method is also disclosed. |