How to make AI face the fixed object while it's moving?

The object which AI is facing needn’t to be the target of AI’s moving. I want to achieve this because sometimes AI should focus on something. Thanks a lot!

If you know AI position and the other object position, you can use “Get Unit Direction Vector”. This will give you a Vector pointing from AI to the object. You can also use “Make Rot from X” if you want to get a rotation from it.
You can use this to update your animation or so.