In order to evaluate the performance of the convection turbulence simulator, the stability of the simulate turbulence is tested and the credibility of the turbulence simulator is improved. The measurement and analysis are done from three aspects of regional stability, wavelength stability and frequency stability by using specific instrument. 21 points in specific locations are chosen for testing the regional stability of scintillation and angle-of-arrival. By using the coherence length as the indicator, 532 nm, 808 nm, 1064 nm and 1550 nm lasers are used to test the wavelength stability of the convection turbulence simulator. Finally, the spectra of scintillation and angle-of-arrival are analyzed to test the spectral stability of turbulence simulator. The experimental results show that, the performance fluctuation of the convection turbulence simulator in a 16 cm ×16 cm area is less than 15%, the coherence length fluctuation under four wavelengths meets Kolmogrov theory and the spectrum fluctuation is less than 20%. The turbulence simulator can simulate the atmospheric turbulence with high precision, high reliability and high stability. The research provides a strong support for the applications of the convection turbulence simulator.