The results of development of multifunctional quasi-optical measuring system, designed to demonstrate the basic radio-measuring techniques in quasi-optical waveguide transmission line THz range It can be used as a training laboratory installation in high-school educational process for training of university students working on a degree in electronics and radio-physics method to the measurements in the THz frequency range, for the demonstration and practical development of quasi-optical waveguide components and devices, as well as to conduct some scientific research in the THz range.