Abstract: According to the development of wind profiler throughout the country, which provides real time wind observation with higher spatial-temporal resolution for forecasters, we introduce two triangle methods and their equivalence for determining horizontal divergence and vorticity. Since Shanghai wind profiler network is in mesoscale observation network, the diagnosing ability of mesoscale system by using wind profiler network was investigated for a real weather case on Jun. 21, 2014, and the results from different methods were compared. It shows that the two methods obtain a better result that appears distinct areas of positive vorticity and negative divergence a companing with the heavy precipitation at that time.