This study analyzes three kinds of data of Penghu waters that come from 5 oceanic WSN water-quality stations, public metrological stations and devices "Small WSN Floating Ball", which are newly exploited platforms for positioning, wireless-communication, temperature-observing, self-recording, low-cost and low power-consumption purposes. A spatial database will then be employed to store those data and crossing analysis, by data-mining methods, the early-warning models of extraordinary water-quality and coral bleaching in Penghu waters. Data will also be used to assist the temporary-location selection for marine cage culture on chill events in winter. Data and results obtained by this study will be helpful for the cage culture to decrease damage from global climate change, as will as the government to made policy decisions on extremely weather and ocean conditions. Benefits will also be noticeable for monitoring the coral bio-diversity environment and for sustainable operation and studies of our (FRI's) Penghu Aqua-Germplasm Bank.