Article presents the description of high resolution spectral complex for the stationary plasma thruster spectrum research. Modeled thruster spectrum analysis is shown. Challenges of qualitative analysis are pointed. Construction of thruster with protective copper mask is presented. Spectrometer technical characteristics: researched spectral ranges and devices resolution of choice are pointed. The necessity of using spectrometer the temperature detector stabilizer is presented. Optical emission spectroscopy experimental scheme for the measurement of erosion rate and plume parameters is graphically designed.