Astrophysics, Space Astronomy, Solar Physics; Space Solar Telescope，Astronavigation.

Invented Independently and taken charge of the development of Solar Magnetic Field Telescope, which win the First prize of Chinese National Science and Technology Progress Award,1987

Have led the researching of the solar magnetic field and velocity field, the research result have win the first prize, Natural Sciences Award, CAS, 1994;

Invented the Two Dimension Solar Spectrometer ，and have pushed forward the solar magnetic measurement method to improve 3 generation.

Take charge of the development of the Solar Multi-Channel Telescope, which win the first prize, Science and Technology Progress Awards,CAS,1996;

Win the HLHL Prize in 1996.

Invented and taken charge of the research and development of China Area Positioning System (CAPS) since 2003.

A Positioning System based on Communication Satellites and the Chinese Area Positioning System (CAPS) Guo-Xiang Ai, Hu-Li Shi, Hai-Tao Wu, Yi-Hua Yan, Yu-Jing Bian, Yong-Hui Hu,Zhi-Gang Li, Ji Guo & Xian-De Cai（Chin. J. Astron. Astrophys. Vol. 8 (2008), No. 6, 611–630）

The principle of the positioning system based on communication satellites GuoXiang AI, HuLi SHI, HaiTao WU, ZhiGang LI & Ji GUO（Sci China Ser G-Phys Mech Astron Mar. 2009 vol. 52  no. 3  472-488）

Barometric altimetry system as virtual constellation applied in CAPS GuoXiang AI, PeiXuan SHENG, JinLin DU, YongGuang ZHENG, XianDe CAI, HaiTao WU, YongHui HU, Yu HUA & XiaoHui LI（Sci China Ser G-Phys Mech Astron  Mar. 2009  vol. 52  no. 3  376-383）