A system, method and device for the internet search based on the peer-to-peer network are provided. A search terminal is set up in each search peer to form a peer-to-peer network. The search request is sent from an original search peer to other search peers progressively via the broadcast/back-propagation mechanism of the peer-to-peer network. Each search peer responds the search request separately, and searches its local index library. The search results of all search peers are gathered in the original search peer, and the original search peer aggregates and sorts the search results. Such search system structure and method have made a complete breakthrough from the architecture of existing search systems, and have provided novelty architecture of the search system, which thoroughly solves the high workload of the search engine server in existing technologies.