  The observable characteristics of the charged black hole (BH) surrounded by a
thin disk accretion are investigated in the Rastall gravity. We found that the
radii of the direct emission, lensing ring, and photon ring dramatically
increased as the radiation field parameter increases, but they only weakly
depend on the BH charge. Three positions of the radiation accretion disk
relative to the BH are considered, i.e., the innermost accretion disk is closed
to the radii of the innermost stable circular orbit, the photon ring of the BH,
and the event horizon of the BH. The observed images in three cases
respectively are obtained. It is found that the total observed flux is
dominated by the direct emission, the lensing ring provides a small
contribution, and the photon ring is negligible. The lensing and photon rings
could not be observed in the blurred image with the EHT resolution. Our results
suggest that the observable characteristics of the charged BH surrounded by the
thin disk accretion in the Rastall gravity depend on both the BH space-time
structure and the position of the radiating accretion disk with respect to the
BH. The research of these BH images may serve as a probe for the BH-disk
structure in M87$^{*}$ like nearby active galactic nuclei.
