The purpose of this research was to develop more reliable and accurate unit factors by investigating water use flowrates, sewage flowrates and pollutant loadings in lodgings and restaurants. Additionally, we intended to present reasonable guidelines for sewage flowrate, objective population and pollutant concentration for buildings classified by their use. The results of this study were as follows : 1) Average unit sewage flowrates were 6.0-15.9L/㎡·d, 210.4-349.8L/capita·d for lodgings, and 77.3-682.2L/㎡·d, 78.1-135.5L/capita·d for restaurants. 2) Average concentrations of biochemical oxygen demand(BOD), total nitrogen(T-N), and total phosphorus(T-P) were 140.6-496.4㎎/L, 210.0-55.5㎎/L, and 2.5-5.2㎎/L for lodgings, respectively, and 51.3-152.4㎎/L, 22.9-43.8㎎/L, and 2.0-5.5㎎/L for restaurants, respectively. 3) The results of this study indicate that it sould be desirable to separate the existing evaluation standards according to whether the guest if permitted to cook(i.e., to distinguish Hotels/Inns from Condominiums), and that it would be desirable to separate th existing evaluation standards for restaurants according to their sewage pollutant loading(i.e., high, medium, and low loading). 4) According to the results of this study, the evaluation standards adopted for the treatment facilities of lodgings were (a) sewage flowrate 33.0L/㎡·d, BOD concentration 170㎎/L, and objective population n(Number) - 0.08A(Area) in Hotels/Innes ; (b) sewage flowrated 530L/㎡·d, BOD concentration 220㎎/L and objective population n=P in condominiums ; and (c) sewage flowrate 600L/㎡·d, BOD 640㎎/L, and objective population n=1.0A in restaurants with high pollutant loadings, sewage flowrate 450L/㎡·d, BOD concentration 500㎎/L and objective population n=0.8A in restaurants with medium pollutant loadings, and sewage flowrate 170L/㎡·d, BOD concentration 270L/㎡ and objective population n=0.4A in restaurants with low pollutant loadings.