For the importance of static and dynamic characteristic of rolling mill AGC hydraulic cylinder, a oneclick AGC hydraulic cylinder characteristic testing system platform was developed, utilizing process data acquisition system to realtime collect and analyze testing data, synchronously achieving the testing operation and report generation. Actual testing results show the platform can be used to test the AGC hydraulic cylinder static and dynamic characteristics effectively, it works reliably, data analysis is clear and actual, meeting the demand of user’s testing capabilities.