On the basis of the data of the outbreak years of Nilaparvata lugens (Stl) in eastern Asia during 1912-2006, the outbreak years of N.lugens in southeastern Asia during 1959-2010, and the relative number of sunspots from 1880 to 2009, by adopting the methods of correlation analysis, phase analysis, key time analysis and cycle analysis, this paper studied the relationship between the sunspot cycle and the outbreak years of N.lugens in Asia. The results showed that there was a very significant positive correlation between the outbreak year (grade) of N.lugens in both eastern Asia and southeastern Asia and the relative number of sunspots in the 17th year before that (P<0.01). The outbreak years of N.lugens in both eastern Asia and southeastern Asia appeared mostly at the declining stage of sunspot activity cycle. Sunspot activity cycle had no significant influence on the outbreak year of N.lugens in both eastern Asia area and southeastern Asia area (P>0.10). The periodicity of the outbreak of N.lugens is 8-9 years in some parts of eastern Asia, while it is 1-2 years in parts of southeastern Asia.