Connection establishing method and device

The invention provides a connection establishing method and device. The method comprises that a business connection request from a first client is received, and the business connection request comprises a business identification and an identification of a second client which is required to connect; and connection reference information is obtained, and when it is determined that the connection reference information satisfies business constraints corresponding to the business identification, connection between the first client and the second client corresponding to the client identification is established. According to the invention, connection needed by business processing is realized.