Floating aquatic plant system using water hyacinth was applied to examine feasibility as a wastewater treatment system for the industrial complex in rural area. The wastewater from the industrial complex does not likely contain toxic pollutants because the industries which generate wastewater with toxic compounds are not allowed to move in. Pilot plant was installed at Baeksuk Nongkong Danzi in Chunahn-City, Chunchungnam-Do, and field study was performed during summer and fall of 1996. Hydraulic loading rate was 0.19m³/m² ·day. The effluent concentration of DO was higher than influent, and it implies that 0.6m depth reactor was reaerated enough to increase DO level. The influent concentration of BOD varied significantly from less than 30 to 120mg/ ℓ during the study period, however, effluent concentrations were generally lower than the water quality standard and removal efficiency was up to 85 %. The influent concentration of COD also showed wide variation from less than 40 to 160mg/ ℓ, and effluent concentration was higher than water quality standard when influent concentration was over 100mg/ ℓ. The influent concentrations of T -Nand T - P were lower than water quality standard and no further treatment was required, and these compounds were also removed in the system. Although some improvement and refinement are still required, overall, the floating aquatic plant system was proved to be feasible to apply to treat wastewater from industrial complex in rural area.