The campus sewage has already been classified as one of the undertaking wastewater, and it can not be discharged unless it meets the standards. Most of the old schools in Taiwan deal with the sewage with the traditional septic tanks, the quality of the treated water is not reliable. The incompletely treated wastewater flows into city rainwater sewer will easily become as a breeding bed for aquatic medium bacteria growth and will threaten the public health. The study utilized the green building ecological engineering of constructed wetlands(CW) as a facility for secondary treatment of campus sanitary sewage. This research focuses on the removal efficiency of CW. The average removal efficiencies of constituents from wastewater are 84.2% for 5-day biochemical oxygen demand(BOD5), 63.4% for chemical oxygen demand(COD), 77.2% for total suspended solids(TSS), and 88.1% for the total coliform(TC). The quality of the discharged water from CW meets the requirements of “The Discharge Standard”. The quality of the effluent water from scenic pond meets the requirements of “The Third Underground Water Standard”, “The Standard of Irrigated Water”, and “The Soil Treatment Standard”. The research established density prediction equation for BOD5, NH4-N, and total coliform, these can be provided as a reference for setting up scenic constructed wetland as well as for recycling water resources.