Hi @wanghai, the graphs you references are a product of the paid software Tobii Ocumen which unfortunately is not supported by the HTC Vive Eye Pro.
However, the XR SDK should work and includes a few sample demos which might be useful for you @ https://vr.tobii.com/sdk/explore/
If indeed you are using the SRanipal SDK (As your link implies) then HTC own forum might be the better place to ask for reproducing a gaze angle charts.