The present disclosure provides method, system, and apparatus for forking transmission of Short Message Service (SMS) messages in IP Multimedia Subsystems (IMS) networks. The method includes: receiving an SMS message, constructing a SIP message in which the SMS message is encapsulated or in which the SIP message carries the content of the SMS message and further includes a forking indication indicating whether forking shall be employed, sending the SIP message to a Service-Call Session Control Function (S-CSCF) in an IMS network, and determining by the S-CSCF whether forking shall be employed according to the forking indication. The method and system of the present disclosure enables the control over the SMS message from the Circuit Switched (CS) domain so that the SMS message can be sent through forking in the IMS domain to more than one user terminal.