Abstract: By using the ground and sounding observation data of meteorological stations in Naqu area, combined with the detection data of FY-4A satellite and new generation weather radar, the two strong convective weather processes accompanied with thunderstorms occurred in Seni District, Nagqu City on August 2 and September 1, 2022 were compared and analyzed with weather diagnosis and analysis methods. The results show that the two severe convective weather processes were caused by the activity of subtropical high in the plateau region, and the convection was triggered at the edge of the high-pressure system. The surface convergence line was the triggering mechanism for the two convective weather processes. The variation of radar echo intensity corresponded to the development and changes of convective weather. The intensity of radar echo was still an important reference indicator for forecasting plateau convective weather. The vertical wind shear and atmospheric water vapor conditions were the main basis for understanding the nature of convective weather. The cloud clusters, brightness temperature of cloud top, updraft cloud top, and other cloud features had important reference value for the development, intensity, and future prediction of severe convective weather.