The invention discloses a system and a method for controlling transmission equipment to perform data transmission, and relates to the technical field of communication network simulation. The system comprises a digital simulation server used for performing dynamic simulation on mirror image network topologies of a plurality of mirror image transmission devices based on communication states among network topology nodes of the plurality of transmission devices to generate a simulation link state, generating the control information according to the simulation link state and issuing the control information to a channel controller; a high-speed data interface used for connecting a plurality of transmission devices with the channel controller; and a channel controller used for receiving the control information of the digital simulation server and controlling the link states of the communication links of the plurality of pieces of transmission equipment through the high-speed data interface. According to the invention, the problems of input and output of high-speed physical data streams and interaction influence with other modules in a semi-physical simulation system are solved.