Atomically precise metal nanoclusters (NCs) stand out within metal nanomaterials due to the distinctive atomic stacking configuration, discrete energy band, quantum confinement effect, and enriched catalytic centers, positioning them as promising substitutes for conventional photosensitizers in solar energy absorption and utilization. However, the light-induced poor stability and ultrashort carrier lifetime of metal NCs as well as the difficulties in modulating charge migration collectively constrain their potential applications in photoredox catalysis. In this work, we conceptually construct the metal NC artificial photosystems by electrostatically self-assembling l-glutathione (GSH)-capped Au