Some doubt about the circle mode

hello everybody
How to set the height and circle center point directly in circle mode?

The altitude is the altitude you’re at. And the circle center point is CIRCLE_RADIUS distance straight off the nose of the vehicle. So if your circle radius is set for 3000cm, it will orbit a point 3000cm straight off the nose of the aircraft at the altitude you’re currently at.

http://ardupilot.org/copter/docs/circle-mode.html

Thank you for your reply.
but i want accurately and directly set center point and height , just like Latitude and longitude(22.5662 , 114.5615 ) and altitude (25 meter).

In free flight, it doesn’t do that. In an auto mission, you can do that.

get it.
in fact, i want to achieve one kind of flight mode, just like follow me mode, but the drone circle around me, so i must directly set the center and height.
is there only way to use guide mode,and keep calculating my and drone location and send “Fly To Here” ?