Abstract: Based on qualitative analysis and Morlet wavelet method, the distribution characteristics of the main tectonic zones and strong earthquakes in Taiwan are studied. There have been three active periods of M≥7.0 earthquakes in Taiwan since 1900. The first active period was from 1902 to 1925, which lasted nearly 23 years; The second active period was from 1935 to 1978, about 44 years; The third active period was from 1986 to 2006, lasting 20 years. Since the Hengchun sea area M_S7.2 earthquake in Taiwan on December 26, 2006, Taiwan earthquakes above M_S7.0 have been quiet for nearly 16 years, which is the longest quiet time in history, and there is a possibility of a new active period. From the regional perspective, M_S≥6.9 earthquakes in the eastern Taiwan had 6 active cycles, most of which lasted about 16 years on average. Each active cycle included active and quiet periods, and all M_S≥6.9 earthquakes occurred in active periods. Statistics show that the activity intensity of the eastern Taiwan had gradually weakened since 2002, when it entered the sixth active cycle. A new active period may have started since the Hualian M_S6.9 earthquake occurred in the eastern Taiwan on September 2022. M_S≥6.0 Earthquakes in the western zone of Taiwan have cycles of about 92 years and 14 years. 1901−1993 was an large active-quiet cycle （about 92 years）. A new round of large cycle activity began from 1994. At the same time, the large cycle also included some small cycles with an average period of 14 years. The accumulation level of small earthquakes calculated by the Nowcasting method shows that the M_S≥7.0 earthquakes in the eastern zone of Taiwan and M_S≥6.0 earthquakes in the western zone of Taiwan have a high background probability of earthquake occurrence, and the strong earthquakes in Taiwan have a certain corresponding relationship with the moderate-strong earthquakes in South China on an annual scale.