In this paper, seismicity indexes A_N-W(b)of Shaanxi, Gansu, Ningxia and Qinghai areas, magnetic storm activity indexes K(b) recorded at Lanzhou Geomagnetic Observatory and sun-sports relative numbers year-average-values R(N) are statisticaly analyzed. We do power spectral analysis and digital filtering. The power spectrum and maximum entropy spectral (MES) analysis of R(N), A_N-W(b) and KSC (b) indicates five main peaks:21, 11, 5, 3and 2 years. Their mutual correlation amplitude and the cross-spectral amplitude represent distinctly that there are above mentioned periods in R (N), A_N-W (b) and KSC (b), too. The correlation analysis showed that correlation coefficient is 0.886 between KSC (b) and A_N-W (b) after perfect low-pass filtering. According to this analysis, that seismicity of Shaanxi, Gansu, Ningxia and Qinghai areas can continue to change stronger in five years is represented. Finally, the mechanism of the seismogenic and triggering process related to the solar activity and magnetic storms is discussed.