Thanks, you're right. I forgot UITable script and some depth and collider settings.
1 more question, Scroll View with Draggable Panel and Scroll View with Draggable camera which 1 is more suitable for background drag scene ?
Because I have certain "tool" graphic will place on the top of background scene and due to collider is place on top of background scene therefore certain area will not able to drag scene.
I will start to try draggable camera scroll view, by the way i hope any advise would be appreciated.