Ocean thermal energy conversion (OTEC) is a power generation system which uses temperature difference between warm surface seawater and cold deep seawater．In this paper，a Web application of remote monitoring (a data acquisition system) for OTEC plant is developed．Since OTEC plants may be located near the ocean or over the ocean，it is necessary to perform remote monitoring of them．A Web application of remote monitoring is developed for the OTEC plant using Rankine cycle．Some important indexes for the performance evaluation of the OTEC plant are also calculated by data obtained from the OTEC plant．Furthermore，a function to detect the abnormality of some pressures is implemented．The effectiveness of the remote monitoring system developed in this research is verifed through simulation．
