The first observations of ₃He²⁺ density extremely enhanced to thousand times of average solar wind by SWID/Chang’E-2 is reported in this paper. The two events occurred near the lunar and the Lagrange L2 point respectively. The synchronized energetic electrons increasing can induce the lunar surface charging to a large negative voltage and produce the electron-impact double ionization of helium-3 in the exosphere. ₃He²⁺ will converge to the lunar surface by the negative potentials, and fully pick up via non-resonance stochastic heating process by Alfvén wave of the solar wind. It indicates ₃He²⁺ in the events can originate from the lunar and transport to L2. Besides SEP (solar energetic events), the increasing of energetic electrons occurs frequently in quiet time, so the loss of the lunar exosphere will be recurrent, and the ionosphere ion void may be formed.