The invention discloses a topology discovery 
system of a next generation 
Internet based on the IPv6 (
Internet Protocol Version 6), comprising a detection 
list input module, an equipment and connection 
relation discovery module, an equipment and subnet topology discovery module, an analysis integration module, a topology structure 
information storage module, a 
database and a topology structure information display module. The invention also discloses a realizing method of the 
system, comprising the following steps: (S1) forming a detection node 
list by the detection 
list input module; (S2) sending a network path detection packet by the equipment and connection 
relation discovery module to acquire a 
router marked by an IPv6 address and a connection relation thereof, and exchanging 
network topology information between the equipment and subnet topology discovery module and the 
router on the network to acquire the 
network topology information; and (S3) analyzing by the analysis integration module to form an integrated topology 
structure diagram. The invention has the advantages of enhanced stability, better performance, 
alias removal, and the like and effectively improves the accuracy and the integrity of topology discovery.