The influence of electric field and interlamellar effect on the electronic energy and wave function of spherical nanometric system is studied. Taking CdS/HgS/CdS as example， the influence of interlamellar effect， electric field and sample linear size on high-energy level Stark effect， spectral line frequency and intensity are discussed. The results show that for the spherical nanosystem CdS/HgS/CdS, the external electric field， Stark effect and the law of level effect-split-level resemble that of the hydrogen atom， but with different displacement of energy levels. The displacement of spectral lines is always proportional to the square of intensity in the electric field， and most spectral lines' frequency excursion decreased with the increase of linear sample-size， while some of the frequency excursions are on the opposite. The spectral line frequency excursion caused by interlamellar effect will decrease with the increase of linear size. Except a few spectral lines， most spectral lines will weaken with the increase of the linear size. Interlamellar effect will not change the trend of the relative intensity changing with linear size， but will make the intensities of spectral lines change. When the linear size is small， the influence of interlamellar effect on the intensity of spectral line is obvious.