The present invention discloses a method, system, service selection entity, and service management entity for selecting a service provision entity in a peer-to-peer (P2P) network communication, so as to select heterogeneous service provision entities for heterogeneous service requesting entities. The method includes: receiving service capability information of service provision entities; obtaining service request information of a service requesting entity; and selecting a service provision entity of an appropriate service capability to provide a service for the service requesting entity according to the service capability information of service provision entities and the service request information of the service requesting entity. The present invention is applicable to P2P overlay networks, wherein the service selection entity, the service requesting entities, and the service provision entity each comprises a respective network enabled communication device selected from anyone of: a client device, a server, and a storage device for peer-to-peer (P2P) network communication.