1. A method for realizing a test, comprising: receiving a test signaling and a planning parameter of an internet protocol (IP) bearer network, wherein the planning parameter comprises traffic volume corresponding to a call model of the IP bearer network; initiating a test service on the IP bearer network according to the test signaling and the planning parameter of the IP bearer network by establishing a test tunnel over the IP bearer network by initiating calls corresponding to the traffic volume, establishing a corresponding number of voice tunnels over the IP bearer network, and transmitting data packets over the voice tunnels according to the test signaling and the planning parameter; and obtaining a performance indicator of the IP bearer network according to a running situation of the test service.