The newly developed radio remote-control system has been operating sucessfully on the ZYQ-12G LHD. The paper features in detail its constitution and functions, working principles of its main components and change-over relation between radio signal and mechanical action, etc. Industrial tests in harsh and dangerous circumstances have proved its excellent moisture-resistance, antivibration and anti-interference properties, the system is suitable to safe and reliable operations for extracting remainder ore in unstable hanging wall zone and has good social and economical benefit.