One of the major trends in the development of climate system models today is to improve the ability to simulate multi-scale interaction processes and extreme events in the climate system by increasing the spatial resolution of climate models. In the past five years, scientists from the Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences (CAS) have developed and improved the 25 km resolution atmospheric circulation model FAMIL2.2 and the 1/10 degree resolution ocean circulation model LICOM3.0, and established the high resolution climate system model FGOALS-f3-H based on them. A large number of numerical simulations and climate predictions have been carried out using the above high-resolution models, including the high-resolution model comparison project (HighResMIP) of the sixth phase of the international Coupled Model Inter-comparison Project (CMIP6), and the establishment of an ocean circulation prediction system (LFS). Preliminary diagnosis and analyses show that compared to low-resolution models, high-resolution models can better simulate important weather and climate events such as typhoons, extreme precipitation, oceanic mesoscale eddies, and mesoscale sea-air interaction processes.