Abstract:The proposed project of the internal co-distribution of combined gas-heat cycling of Xin Cheng Development Zone of the City of Bangbu is analyzed in terms of the two major economic indexes, namely, its internal profitability and rate of returns on investment,indicating the economic sensitivity and its range of fluctuation and its order of variations of such four factors as total investment, natural gas price, electricity price and heat price, thus eventually coming up with a diagram showing the relation sensitivity of the net present value [NPV] vis-a-vis the price of electricity,natural gas and heat.