The computer room deployed with the following devices: satellite receiver, encoder, digital receiver, EPG sever, streaming media server, hard disk etc. which are used for receiving analog and digital signals, and then converting the signals to digital signals, and then transfer the digital signals to the servers. Moreover, there are educational and training media sources including legal advocacy, mental health education, and labor vocational skill training stored in the server. The server in the computer room connected to the private network of the prison, which support importing the remote and local educational and training media sources.