Zhang heng, in the east han dynasty, invented the earth dynamic instrument, but owing to the loss of history, the earth dynamic instrument can only be restored in accordance with the historical records by the researchers. I hope that more people will know about the culture of the wind power meter in China. The invention of seismometers at home and abroad is presented by combining the time series diagram, spatial relationship diagram and classification correlation diagram. The weather seismograph in the eastern han dynasty is taken as the main diagram, which is decomposited and explained. The invention of seismometers at home and abroad is compared.