By using the method of multi-variable analysis, 66 District Heating and Cooling (DHC) systems in Japan have been evaluated in the aspects of business profits, energy-saving and environmental protection, amenity and safety. We get the result that the business profits are affected by the following factors: the plant area/heat demand area, heat price, operation rate, total district pipe length/heat demand, heat demand density, and the maximum of heat demand/the average heat demand. In the one-variable analysis, about 3% DHC systems have low business profits. COP is the most important factor in the energy saving and environmental evaluation, and about 24% have good performance in this aspect. 27% have good performance in amenity and safety evaluation. In the multi-variable analysis evaluation, Type-86 has best business profits among these 7 types, Type-87 has best energy saving and environmental protection performance, and Type-85 has best amenity and safety. According to the order of evaluation index presented in this article, we can find the problems of existing DHC systems and their solutions.