The present invention relates to communication techniques, and discloses a method for the calling party to reinitiate a call in card number service, so that the calling party in card number service can conveniently release his current call and reinitiate a new call. In the present invention, the call controller instructs the calling gateway to detect the preset key combination in the session, if the calling gateway detects the key combination, then reports it to the call controller, and the call controller sends a message to the called party to release the call and releases the called party, and simultaneously sends an indication that the called party has hung up to SCP and waits for the calling party to dial again. The present invention enables the calling party to control his dial completely by himself, so as to dramatically save the time for the calling party of card number service to initiate a new call, and make the services more user-friendly. At the same time, the technical solution of the present invention also alleviates network load to the maximum extent.