Hi niyijr thanks so much for your help.
I tried access with Firefox, Chrome, IE, EDGE but it the result is the same.
I'm sure this monitor is vcenter. because before, my friend installed vRA and integrated it with vCenter, and since vCenter v6.0 it always shows like that. Attached screenshot of my vCenter 6.0 on Windows.
I tried to remove vRA plugin in vCenter, but can not see it in ExtensionManager: