The method of dual functional calculus is adopted and ground state energy and wave function of helium aton and quasi_helium ion Li +,Be ++ ,B +++ ,C 4+ ,N 5+ ,O 6+ are obtained.

• 采用二元泛函变分的方法 ；求出了氦原子及类氦离子Li+ ；Be+ + ；B+ + + ；C4 + ；N5+ ；O6+ 的基态能量与波函数 .