Huanan, Huazhong, Jianghuai and Long Delta mesoscale observation and application test bases of State Key Lab of Severe Weather have been set up base d on the above theories and techniques. Huanan base as a example, which is relat ed to how to implement and test new techniques, is introduced. It constructs a n ew style mesoscale synoptic platform for testing in the Huanan base. Based on setting up Huanan base, the Huazhong, Jianghuai and Long Delta bases will also b e constructed. How to enhance detecting, forecasting and warning capability of m esoscale severe weather will be investigated through testing running the four mesoscale synoptic operational platforms in the above four bases.