  The dependence of the black hole (BH) shadow and thermodynamics may be
structured in the regular spacetime. Taking the regular Bardeen-AdS BH as an
example, the relationship between the shadow radius and the event horizon
radius is derived. It is found that these two radii display a positive
correlation, implying that the BH temperature can be rewritten as a function of
shadow radius in the regular spacetime. By analyzing the phase transition
curves under the shadow context, we found that the shadow radius can replace
the event horizon radius to present the BH phase transition process, and the
phase transition grade can also be revealed by the shadow radius, indicating
that the shadow radius may serve as a probe for the phase structure in the
regular spacetime. Utilizing the temperature-shadow radius function, the
thermal profile of the Bardeen-AdS BH is established. We obtained that the
temperature shows an N-type change trend in P<Pc situation. These results
suggest that the phase transition process of the regular AdS BH can be
completely presented in the thermal profile, and the relationship between the
BH shadow and thermodynamics can also be established in the regular spacetime.
