Caption-Figure Alignment

[Moco]

Can anyone show me how to make caption and figure in a figure plot vertically 
aligned? 
For now, it seems that the caption is left-adjusted while the the figure 
is right-adjusted. I can partially manually fix this (either change the left-
bottom value, or use minipage and the width setting).
 Still, I can never adjust 
the figure to the left, and the current way of fixing is quite laborous.