Abstract: Based on the NCEP/NCAR reanalysis data and the sea surface temperature (SST) data from the NOAA, the influence of SST anomalies (SSTAs) associated with the ENSO and IOD (Indian Ocean Dipole) events on low-level anomalous anticyclone in the Philippine Sea (named PSAC) was investigated using diagnosis methods and simulation experiments. The results are as follows. There is a more significant relationship between the IOD events in preceding autumn and the PSAC from winter to spring than that between other Indian SSTA events and PSAC. In a pure El Niño year, there is a notable PSAC appearing over the Philippine Sea from November to the following April. Compared to the El Niño events, the influence of pure positive IOD events on the PSAC is much weaker based on the reanalysis data and has shorter lifecycle from November to the following April. In the co-occurring year of El Niño and IOD, the PSAC tends to enhance and remain until the following August, which indicates that these SSTA events reinforce the PSAC jointly.