With the widespread popularity of the Internet, a rapid increase in network bandwidth and the computing power attracted more attention. P2P (Peer-to-Peer Network) network and its application has gradually become a research hot spot. In P2P network, resource discovery and network traffic technology play an important role for a high efficiency network. In this paper we analyze the resource discovery, proposed a novel method to find network resource. With the new method, the load balancing between the network nodes can be guaranteed. In addition, an investigation, through the network traffic generated by P2P application, was examined. In order to improve the operating efficiency of the P2P network, we presented a new routing method combined with the shortest path to predict traffic congestion state and local information. Simulation results show that our proposals are feasible