This study proposes a new ontological perspective for quantum mechanics: phenomena such as quantum wave-like behavior, randomness, and electron clouds may not be intrinsic properties of particles but originate from the structure of space itself. This perspective is founded on a re-examination of the formation mechanisms of electron orbitals and clouds. We particularly elucidate the origin of the "point-like randomness" exhibited by quantum entities, revealing that it is not an inherent property but stems from the dualistic structure of space and the inherent limitations of current observational technology.This dualistic structure of space manifests as "Open Dimensions" and "Closed Dimensions." Present technology can only detect phenomena on the "Open Dimensions." When a quantum entity possesses low kinetic energy, it primarily moves within the "Closed Dimensions," becoming instantaneously detectable only when passing through an intersection point between the two dimensions; the statistical distribution of a vast number of such instantaneous events manifests as the electron cloud.Based on this dualistic structure, the paper further deduces the fundamental unit of space—the "spatial cell"—and thereby constructs the "Spatial Cell Theory." The theory posits that space is woven from discrete "spatial cells." Each cell contains two functionally distinct dimensions: the "Open Dimensions" serve as connecting channels, linking cells to transmit matter, energy, light, and more; the "Closed Dimensions" do not participate in intercellular connections and serve as the primary arena for the motion of quantum entities with low kinetic energy. Within this framework, a wide range of physical phenomena—including the superluminal correlations of quantum entanglement, dark energy, dark matter, double-slit interference, quasars, and the microscopic dynamics of gravity—can be explained within a unified mechanistic framework.