The purposeful construction of dual Z-scheme system to the formation of intimate interface contact and multi-channel charge flow through the system remains a huge challenge. Herein, a tandem 2D/0D/2D g-C₃N₄ nanosheets/FeOOH quantum dots/ZnIn₂S₄ nanosheets (CNFeZn) dual Z-scheme system (DZSS) has been successfully constructed using electrostatic self-assembly method. Owing to the band structure and elaborate morphology of 2D g-C₃N₄, 0D FeOOH and 2D ZnIn₂S₄ in unique designed DZSS, plenty of spatial charge transfer channels are formed between the g-C₃N₄/FeOOH and FeOOH/ZnIn₂S₄ interfaces, which greatly accelerate the charge separation and transfer. As bifunctional catalysts, CNFeZn DZSS achieves the highest H₂ evolution rate of ~436.6 μmol/h with a great promotion of ~10.6 folds and ~6.9 folds compared to pristine g-C₃N₄ and ZnIn₂S₄, respectively. Meanwhile, the H₂O₂ production rate reached ~301.19 μmol/L after 60 min irradiation, up to ~5.1 times and ~2.3 times that of pristine g-C₃N₄ and ZnIn₂S₄. Experiment and DFT calculation further confirmed that the stable double built-in electronic field can be formed owing to the electron configuration between double interfaces, and reveal that the ample atomic-level charge transfer channels were established in the strong interaction connected double interfaces, which can act as the charge migration pathway promote the separation of photogenerated charges.