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It is the first discovered sunspots is the most familiar kind of solar surface activity. Because the magnetic field inside the sun changes, the number of sunspots is not fixed, it changes over time fluctuations, the time intervals to reach a high point, this time it was called a sunspot cycle. Cyclical changes in sunspot activity first discovered by Schwabe. Wolf (R. Wolfer) and then calculate the 11-year cycle rule. In fact, sunspot activity was not only the 11-year cycle, as well as sea-ear magnetic field distribution in the study of sunspots and found a 22-year cycle Grameen Myers, who found 80-year cycle and the Maunder minimum, etc. . Because the law is extremely complex sunspot activity, scientists are still working today to study its internal rules and features. In fact, the laws of sunspot activity on the study not only of theoretical significance, but also has direct application requirements. Cyclical changes in sunspot activity, and Wolf (R. Wolfer) based in the past 288 yea