The issue of green energy and solar photovoltaics has received international attention. Due to the wide aquaculture area and sufficient sunshine in the southwestern coast of Taiwan, it was suitable for the development of solar photovoltaic combined breeding, and the use of aquaculture area transformation into fish-electric symbiosis has potential for development in the future. Among them, floating solar photovoltaic does not change the landform, has elasticity and variability, and is suitable for the development of fish-electric symbiosis. However, there was still a lot of unknown research on photoelectric combined with traditional Epinephelus fuscoguttatus x Epinephelus lanceolatus and Eleutheronema rhadinum culture. This study simulates photovoltaic panels at different shield rates of 40 % and 0 %. Comparing the temperature, salinity, pH value, Do, oxidation reduction potential, growth and survival rate for Epinephelus fuscoguttatus x Epinephelus lanceolatus and Eleutheronema rhadinum of the water quality parameters in the pool under the same feeding conditions. The results show that the environmental factors changed significantly with the monthly climate. Simulating the floating solar photoelectric farming process of grouper and Eleuthe ronema rhadinum, there is no significant difference between grouper and Eleutheron ema rhadinum growth. The water quality factors of the two treatment groups of the Epinephelus fuscoguttatus x Epinephelus lanceolatus and Eleutheronema rhadinum were within the safe range during the breeding process. This study aimed to investigate the effect of different shading ratio (0 % and 4 0%) on Japanese sea bass (Lateolabrax japonicus) aquaculture, including fish growth performance, water and bottom soil parameters and fish fillet quality. The results show growth performance of experimental group (shading ratio 40%) is similar with control group (shading ratio 0%). After culture for 8 months, the final weight of sea bass are 665.23±120.51g and 714.03±127.17g, respectively. There is no significant different on total length, weight and condition factor (K) between control group and experimental group. According to temperature records, the daily maximum water temperatures of experimental group were 1.1 ℃ lower than of control group during high-temperature period. Moreover, the daily water temperature differences were 0.6℃ lower in experimental group on average. The concentration of chlorophyll a in control group was higher, which lead to lower transparency and higher suspended solid compared with experimental group. And the differences of chlorophyll a concentration also result in different pattern of daily dissolved oxygen change. In aspect of nitrogenous wastes and total phosphorus, control group had lower total ammonia nitrogen (TAN), nitrite and nitrate before August, after that the concentration of nitrogenous wastes increased due to microalgae mortality. The concentration of total phosphorus decreased after microalgae grew in control group, which make slight difference between control group and experimental group. Bottom soil oxidation–reduction potential (ORP) in control group was lower than experimental group. There were no notable differences in hardness, pH, sulfide, 5-day biochemical oxygen demand (BOD5) and microbial count. In fish fillet quality, we examined the coloration and texture profile, and there were no significant difference between control group and experimental group.