The wheel leaves of Kaplan turbine are important components that convert the kinetic and potential energy of water into mechanical energy. The overall performance of the unit was changed when water turbine blade was replaced. The test must be performed on the output and vibration. In order to test the operation of the set of dynamic balance quality, dynamic characteristics of hydraulic turbine, and the maximum load capacity verification, the stability of hydraulic turbines was tested. The test results show that the unit could operate safely and stably in the water head under the rated power.