A searching system, searching method and P2P devices for a P2P device community are provided. An online server connects to a content management server and a P2P device community, respectively. The content management server includes a search engine and an index database, and each of the P2P devices of the P2P device community is provided with an indexed data and a weighted data. The index database is recorded with the indexed data associated with each of the P2P devices of the P2P device community, and the search engine searches the index database to generate a search result and then generates a weighted and sorted search result based on the weighted data, thereby achieving the object of searching important file data in the P2P device community.