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Seaweed is one of the leading commodities that has enormous potential supported by sea area of 5.8 million km2 with a total area of seaweed cultivation reaching 1.110.900 ha (LIPI, 2009). South Sulawesi Province became the main center of seaweed in Indonesia with the largest contribution (29%) in 2016, one of which was in the Takalar Regency. One type of kelp cultured in ponds is Glacilaria sp. Seaweed production is a strategic step at the level of crop development as it involves a high workload, a simple growing technology, a relatively short planting time of about 45 days (fast yield) and relatively cheap production costs. The growing demand for seaweed from year to year does not follow rising production volumes and fluctuating prices. The purpose of this research is to determine the description of the agrifood subsystem and to determine the productivity of the seaweed company Glacilaria sp. in the regency of Takalar. The design of the research uses qualitative and quantitative types. The number of samples used was 63 people. The method used is observation, interviews and questionnaires. The results of this research are a general description of the agri-food subsystem of seaweed, namely that the seizure process begins at the stage of land supply, facilities and infrastructure, nurseries and maintenance up to the stage of development. exit from harvesting, drying and selling processes. The results of the formulation of productivity, is the use of production, must be lower than the results obtained in terms of inputs, so that the income of fishermen exploiting seaweed Glacilaria sp. can increasing.