The invention provides a system for simulation study for recognition study of hidden danger of a power system based on WAMS data. The system comprises a WAMS data platform, a PMU simulation data sending module, a man-machine interaction module and a power grid hidden danger recognition module. The PMU simulation data sending module is connected with the WAMS data platform which is connected with the power grid hidden danger recognition module, and the power grid hidden danger recognition module is connected with the man-machine interaction module. The PMU simulation data sending module is used for sending PMU historical data or manually-produced PMU data to the WAMS data platform and the power grid hidden danger recognition module is used for acquiring PMU simulation data and power system model data from the WAMS data platform for analysis and sending a hidden danger recognition result to the man-machine interaction module for display. The power system model data and the PMU simulation data acquired from the WAMS data platform are completely analyzed, the power grid hidden danger recognition module can effectively recognize the power grid hidden danger, and then an effective and reliable simulation study environment is provided for stability study of the power system.