This paper proposes to use the Coulomb-charged spacecraft to implement a formation flight in the vicinity of the Earth-Moon Lagrange point L2, a key idea for the Moon’s space station design, control, and engineering implementation. The paper presents a “non-dimensionless” dynamics model to track Halo orbits and implements an optimal control strategy to analyze the controllability of that model. Later on, the paper introduces a reliable cost function to optimize the total charge of the formation flight system, and thus, the energy consumption of the formation configuration. The simulation results show that the “non-dimensionless” model and proposed Coulomb charge optimization approach are reliable for the Moon’s space station design and implementation. This research provides a valuable reference for deep-space formation implementation and a feasible reference for the engineering use of electrostatic energy in deep-space exploration.