The invention discloses a method and a system for realizing IVR (Interactive Voice Response) operation in narrow-band intelligent service. The method comprises the following steps of when a narrow-band intelligent network performs the narrow-band intelligent service, if the narrow-band intelligent service is related to IVR operation, transforming a corresponding IVR operation request to a wide-band intelligent network, and utilizing the wide-band intelligent network instead of intelligent peripherals to carry out IVR operation (such as voice playing, recording, DTMF (Dual Tone Multiple Frequency) operation, etc.) according to the IVR operation request. The wide-band intelligent network supports SIP (Session Initiation Protocol), MGCP (Media Gateway Control Protocol) and other protocols, and has the advantages of bandwidth and response speed, so that when the wide-band intelligent network is utilized to carry out IVR operation, the wide-band intelligent network can bear more services online simultaneously, is more convenient and flexible aiming at different service control, and can respond various customized requirements of users on IVR voice more instantly, the subsequent voice update is more flexible and convenient, and the subsequent maintenance cost is reduced.