Formation and Evolution of
Galaxy Clusters Across Cosmic Time

We analysed member galaxies of 17 clusters from the COSMOS field at z~0.5-1.0 and used the rest-frame UVJ diagram to classify SFG, QG and RQG. We define quenching efficiency and quenching stage to quantify the quenching process and confirm mass and environmental quenching. We found that environmental effects are stronger for low mass galaxies, while mass quenching is more important for massive galaxies. Model evolutionary tracks are adopted to distinguish fast and slow quenching galaxies and quenching timescale depending on stellar mass. It turned out that ram pressure stripping dominates the quenching of low mass galaxies in the dense region and AGN feedback dominates the quenching of massive galaxies in the low-density area.