The Unified Fractal Quantum Field Theory (UFQFT) proposes a resonance-geometric framework in which matter, interactions, spacetime, and cosmology emerge from the dynamics of two fundamental fields: the energy field (Φ) and the charge field (Ψ), embedded within a fractal spacetime characterized by a critical effective Hausdorff dimension of D ≈ 2.7. In this paradigm, elementary particles are not fundamental point-like entities but stable resonance configurations of coupled Φ—Ψ fields, while mass, charge, spin, and particle stability arise from fractal resonance structure and dimensional localization. The theory identifies D ≈ 2.7 as a critical threshold at which confinement, long-range interactions, temporal evolution, and stable matter coexist, providing a unified geometric explanation for the emergence of ordinary matter, dark matter, dark energy, and the arrow of time. Gravity is reinterpreted as an emergent symmetry-restoring response of the fractal field, whereas electromagnetic, weak, and strong interactions arise from distinct resonance modes and topological transitions of the same underlying field system. UFQFT further extends naturally to nuclear structure, halo nuclei, neutrino oscillations, CP violation, baryogenesis, black-hole interiors, neutron stars, and bubble cosmology, offering a common geometric origin for phenomena traditionally described by separate theoretical frameworks. A scale-dependent dimensional flow from microscopic fractal regimes to macroscopic classical geometry establishes a UV—IR bridge linking particle physics with cosmological structure formation and large-scale dynamics. The framework yields a broad range of experimentally testable predictions, including fractal corrections to particle lifetimes and scattering processes, modifications to neutrino oscillation patterns, sub-millimeter deviations from Newtonian gravity, distinctive signatures in halo nuclei, scale-dependent suppression of the cosmological matter power spectrum, non-standard gravitational-wave propagation, and observable imprints in future cosmological surveys and precision laboratory experiments. Collectively, UFQFT suggests that the Universe is fundamentally a hierarchy of resonant geometric structures rather than a collection of elementary particles and forces, providing a unified and falsifiable pathway toward the geometric unification of quantum physics, gravitation, and cosmology.