In order to improve the feeding problem of clam in Taiwan, the research aimed to discuss the influence of the concentration, feeding frequency and species of microalgae on the feeding of clam, to establish a stable feeding program of clam and microalgae, and to combine with a low-light clam culture mode of optoelectronic facilities so that establishing application of clam intake and microalgae culture integrated cultivation system therefore balanced aquaculture relationship and effectively expanding the production efficiency of a single area. The results showed that the characteristics of each algae strain were different. In outdoor culture, it was necessary to combine with the suitable culture environment. Thalassiosira weissflogii and Pavlova viridis had a wide acceptance of environmental requirements and easy to culture. Pavlova salinais susceptible to environmental changes so that culturing requires lower light and lower temperature; Tetraselmis subcordiformis is more suitable for low-light culture. It is better to feed clams with 1 x 104 cells/cm3 of Thalassiosira weissflogii , 20 x 104 cells/cm3 of Pavlova viridis , 40 x 104 cells/cm3 of Pavlova salina or 7x104 cells/cm3 of Tetraselmis subcordiformis . The feeding experiment of clam was carried out with different algae species and different feeding frequency. The reaserch display that feeding clam by Isochrysis aff. galbana twice a day had the best effect on the weight gain and SGR of clam.