Through combining the cultivation of finfish with Gracilaia and oyster, we have successfully established integrated multi-trophic aquaculture (IMTA) system. Furthermore, photosynthesis bacteria were used to improve the water quality. After 13days of rearing, the growth in weight (total length) of milkfish increase from 22.4±6.4 g to 53.0±12.6 g (14.3±1.2 cm to 17.8±1.3 cm) in in the northern system and the growth in weight (total length) of pompano increase from 65.3±9.6g to 95.9±17.8 g (13.1±0.7 cm to 18.1±1.2 cm) in in the northern system. Finally, during the period of experiments, pH, temperature, salinity, transparency, dissolved oxygen in fish ponds are suitable for breeding, and ammonia nitrogen, nitrite nitrogen concentrations are also below the safe concentration.