By using the virtual reality technology， the 3D technology， the multimedia technology and the network technology， the long-distance hypothetical laboratory training and the skill appraisal system is constructed. The system simulates and integrates all specialized training and skill appraisal work of the electric testing. The simulation and network training system can simulate the true environment and is convenient for the on-site testing training work. The target and principle of design， the thoughts of development， the system software and hardware plan， the key technology， the main simulation function and the application situation of the simulation system are introduced.