  It is expected that the astrophysical black holes are surrounded by a
luminous accretion flow that is a necessary ingredient for imaging a black
hole. In this paper, we study the influence of quintessence dark energy on the
shadow images of a Hayward black hole surrounded by the static/infalling
spherical accretion flow. We find the effect of the state parameter of
quintessence matter on the horizons, photon sphere and impact parameter of the
quintessence Hayward black hole. The observed specific intensity of the shadow
and also the shadow and photon ring luminosities of the quintessence Hayward
black hole in two different spherically accretion flow are investigated. We
also use the Event Horizon Telescope observational data of Sgr A* and M87* to
constrain the free parameters of quintessence Hayward black hole. Finally, by
comparison the results of quintessence Hayward black holes with quintessence
Schwarzschild and Hayward black holes we find that the effect of quintessence
matter on the black hole shadow is more significant than the regularity effect.
