Abstract: 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=0.001L^3.667, the optimal regression equation for the body weight and total length of small size of juvenile "Yunlong grouper" was W=0.011L^3.142. 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.