The present invention relates to a super capacitor material NiO synthesis method, belonging to the energy storage electrode material field. In the method, microemulsion dispersion liquid drop is taken as a microreactor, nanometer stabilized alpha-Ni(OH)2 is synthesized by co-doping metal cation, and heat treatment is carried out on the alpha-Ni(OH)2 to obtain doped nanometer NiO material, and wherein the doped metal cation is one or more than one of Al<3+>, Cu<2+>, Y<3+>, Mn<2+>, Zn<2+>, Co<2+>, Cr<3+> and Fe<3+>, the ratio of doped ion and nickelous ion is 0-0.2, and the microemulsion is 'Triton X-100/normal butanol/cyclohexane/water' four-component system. The material obtained by the method is used in super capacitor, the specific capacity is higher, the conductivity is good, the synthetic route is simple, the condition is easy to control, and the product purity is higher compared with general NiO material, thus being applicable to commercialization production.