In this paper the relationship between the variation of shrimp resources (which is sensitive to the sea temperature of the Huanghai and Bohai Seas) and the equatorial sea surface temperature is analysed, the results obtained showing high correlation between the two. Therefore, a new approach to studying long-term variational law of fishery resources and forecasting method is made through large-scale air-sea interaction. In this paper the relationship between the variation of shrimp resources (which is sensitive to the sea temperature of the Huanghai and Bohai Seas) and the equatorial sea surface temperature is analysed, the results obtained showing high correlation between the two. Therefore, a new approach to studying long-term variational law of fishery resources and forecasting method is made through large-scale air-sea interaction.