The “Yunlong grouper”, Epinephelus moara♀× Epinephelus lanceolatus♂, were reared in the sea area under the condition of cage-culture. The initial average body weight of big size of juvenile “Yunlong grouper” was (357.00 ± 8.31) g, and the average total length was (29.95 ± 2.51) cm，the initial average body weight of small size of juvenile “Yunlong grouper” was (19.85 ± 1.23) g, and the average total length was (11.63±1.13) cm. The water temperature ranged between 14.2℃ and 29.2℃ during the experiment. The fish was feed with grouper formula feed, with 46%~48% crude protein. After 12 months of cultivation, the average body weight and total length of big size of juvenile “Yunlong grouper” reached to (1 650.22 ± 20.23) g and (44.72 ± 3.73) cm, the average body weight and total length of small size of juvenile “Yunlong grouper” reached to (480.20 ± 22.32) g and (32.41 ± 3.53) cm, and the feed coefficient was 1.22. The optimal regression equation for the body weight and total length of big size of juvenile “Yunlong grouper” was W=0.001L3.667, the optimal regression equation for the body weight and total length of small size of juvenile “Yunlong grouper” was W=0.011L3.142. The optimum water temperature for deep-sea cage-culture of “Yunlong grouper” ranged between 21.2℃ and 28.7℃。The results showed that deep-sea cage-culture can be adapted to Yunlong grouper in Fuzhou.