Projection is a widely used method in bipartite networks.However,each projection has a specific application scenario and differs in the forms of mapping for bipartite networks.In this paper,inspired by the network-based information exchange dynamics,we propose a uniform framework of projection.Subsequently,an information exchange rate projection based on the nature of community structures of a network (named IERCP) is designed to detect community structures of bipartite networks.Results from the synthetic and real-world networks show that the IERCP algorithm has higher performance compared with the other projection methods.It suggests that the IERCP may extract more information hidden in bipartite networks and minimize information loss.