The present paper describes the many--years accumulated data of the growth rates;annual variations of surface and bottom water temperatures; the characteristics of watersystem distribution and the changes in inshore waters of Dong Hai and Huang Hai inSpring season since 1960. It has also disscussed the changes of the water tamperature in relation to the fisheries in these sea areas. There are specific the of the water temperature distribution in these sea areas inSpring season. In Huang IIai it is in the form of trough shape, the in Dong Hai it is inthe form of ridge shape. The water system of these sea areas is influenced very much bythe coastal cold water of Huang Hai, warm current of Taiwan, the fresh water currentfrom Chang Jiang and the cold water mass off the southeast coast of Qing Dao. The tem-perature changes and the variation of positions of them would greatly affect the tempera-ture statue and distribution of the whole sea area, and it seems one of the reasons that itleads the temperature distribution and variation of positions to be different each year. In combining with fishing operation, the variation and distribition of watertemperature is analysed in relation to the migration of fishes and the time of fishingseason. It is pointed out that investigation of water temperature distribution and changesin the fishing grounds is important in making fishery forecast. Some useful watertemperature indices are provided for fishery forecasting.