A method and a device for holding calls between networks are disclosed herein. The method includes: receiving a call hold request sent by a UE in a CS network, where the call hold request carries an indication that the UE in the CS network will continue sending media streams; and instructing a peer device to keep receiving the media streams from the UE in the CS network and stop sending the media streams. In the technical solution under the present invention, the UE in the CS network partially releases the radio resources after initiating the call hold operation, and therefore, the UE in the CS network can play local media files to the peer device after the call is held, thus saving network resources and improving the user experience.