how to orient of Z-local-axis through a given Point I have a object 'A' with it's local-axis. And I have a Point 'B' with it's location (x,y,z)

Now I want to the Z-local axis (or X or Y-local axis) of 'A' toward to 'B' (the virtual straight line that Z-local axis be in goes through 'B'). of course the object 'A' not moving, only rotate.

is there a simple way to do it?
You could just assign a Damped Track constraint to object 'A'. (You can set any axis to track the target)..



If at some stage you want to remove the constraint but leave 'A' in place, you can CtrlA > 'Apply Visual Transforms'