System for distributing multi-field content based on P2P technique as well as corresponding method

The invention discloses a multi-domain content distribution system based on P2P technology, comprising: an edge server, a content releasing terminal, a user terminal, an authentication center, a tracing server, an intelligent releasing terminal; also distributed Hash table and a content router; wherein, a field is divided according to the autonomous system of ISP. A field is composed of a content router, a tracing server and at least an edge server. The edge server, authentication center, tracing server are respectively connected with the content server. The user terminal, content releasing terminal and intelligent releasing terminal are directly and indirectly connected with the edge server. The content routers in different fields are connected by the distributed Hash table and connected with the authentication center. The edge routers in different fields are connected.