The purpose of this study is to obtain basic data concerning to the actual conditions of water consumption, refuse quantity and malfunctions occur in sanitary equipment to present the materials for the planning of building maintenance and management. The maintenance records at a certain office building are investigated and analyzed for this purpose. The water consumption data are compared with the consumption of toilet rolls that indicate the number of persons in the building. The trend of increase and decrease of refuse quantity for 5 years is analyzed. And some features of the malfunctions occur in the sanitary equipment are grasped.