Abstract: Nubbins from Galaxea astreata in March were dissected and cultured in unifactor and control experiment.By the survey of growth characteristics and metabolic level under a range of light wavelength and light intensities, The results suggested the four spectral quality (240 μmol photons/m²/s) produced significant impacts on the areal zooxanthellae density (Z) and chlorophyll-a content (A) and showed a significant differences between control and treatment (p < 0.05).Both parameters of peaked at 380~460 nm, except carbohydrate, lipid content to almost 10-fold higher values for the Protein(P) and Carbohydrate(C).The light-dependant calcification rates (G_L), net photosynthesis (P_N) and gross photosynthesis (P_G) showed significant difference among them under a range of light wavelength and light intensities (p < 0.05).The increases of light-dependant calcification rates(G_L), gross photosynthesis (P_G) and net photosynthesis (P_N) Along with the increase of light intensities, and begin to stop increase or decrease when the light intensities peaked at a threshold that was found between the light intensity and photosynthetic efficiency.Accordingly, The ratio of light-dependant calcification rates (G_L) to dark calcification rates (G_D) and light-dependant calcification rates (G_L) to gross photosynthesis (P_G)remains a similar variation curve and the ratio ranges from 3.06 to 9.89 and 0.21 to 0.60.However, The ratio gross photosynthesis (P_G) to net photosynthesis (P_N) begin to decrease Along with the increase of light intensities and the ratio ranges from 1.20 to 2.69.