Abstract: This paperis focused on the detection of equatorial waves related to the intraseasonal oscillation/super cloud cluster system.Since tropical waves can be generally defined as the tropically trapped eigenmodes of the linear dynamics of the tropical atmosphere,POP technique is regarded an effective method to separate all kinds ofequatorial waves from observed data.Data of infrared equivalent black-body temperature by Japanese Geostationary Meteorolo gical Satellite are subjected to a POP analysis.The results suggest that within a ISO/SCC system,eigenmodes with a period of about 40 and 10 days mainly exhibit Kelvin wave-like features,while those with periods of 2.1 and 1.8 days correspond to the westward-propagating inertio-gravity wave with meridional mode number n=1 and eastward-pro pagating inertio-gravity wave with n=2,respectively.An eigenmode which behaves like mixed Rossby-gravity wave is also found in the analysis.