PREDNASAJUCI / LECTURER : Jie Chen (1) National Astronomical Observatories, Chinese Academy of Sciences, China (2) Huairou Solar Observatory, China NAZOV / TITLE : Solar Magnetic Field and Solar Activity ABSTRAKT / ABSTRACT : The magnetic field plays an important role in solar activities. Huairou Solar Observing Station has a 40-year history of photosphere magnetic field observation and has accumulated a large amount of observation data. The relationship between the solar magnetic field and solar activities of different scales will be introduced.