There has been significant interest in heteronanostructures with controlled topologies and configurations for designing efficient photocatalysts. Herein, we present a promising solar energy conversion platform constructed by the intimate contact of graphene, semiconductors (TiO₂) and plasmonic metal nanocrystals (octahedral Au nanocrystals) with well-defined configurations. The complete wrapping of TiO₂ shell around Au nanocrystals and the sequential graphene encapsulation over TiO₂ shell were successfully realized by sol-gel processes, self-assembly methods, and post-calcination. Through core-shell engineering of the ternary hybrids, the plasmonic band of graphene encapsulated Au@TiO₂ core-shell nanostructures has redshifted from 550 nm to around 700 nm. Accordingly, the prepared nanostructures exhibited superior photocatalytic hydrogen production under visible light (λ > 400 nm) and red light irradiation (λ = 700 nm). A series of mechanistic studies on the photocatalysis indicated that the prominent photocatalytic activity of the hybrid nanostructures is attributed to the synergism between the hot electron transfer from Au nanocrystals and the efficient space separation of charge carriers by graphene. This study can provide new insights in designing heteronanostructures for visible and red light responsive photocatalysis.