On the basis of 3069 region earthquake events recorded by the Fujian Digital Seismic Network from October,2008 to December,2015,we calculated the deviations of the single station magnitude and the average magnitude of the network,and found that the magnitude of the average deviation of each station was -0.31~0.68. We also calculated the period time for magnitude measurements,and found that the advantageous period time was 0.06~0.38s. The site response inversion of each seismic station by the Moya method reveals that 98 stations responded to 1~20Hz band,and had an amplifying or inhibiting effect on certain frequency band information. The comparison of the 0.8s magnitude deviation of Wood-Anderson pendulum seismograph with the average magnitude deviation of the each station shows that there was a good linear relationship between the magnitude deviation of the advantageous period time site response. The result shows that the average magnitude deviation of a single station had a close relationship with the site response of the corresponding period of magnitude amplitude.