The CCHP system can provide with cold, thermaland electric power simultaneously, which has good economic and en.vironmental protection.However, due to the great fluctuation of us.ers at different periods, the system can not operate at rated power allday, and the system can not meet the user's demand fully, it makesCHHP can not have a good economical efficiency.In order to betterplay the operation efficiency and improve the economy of the sys.tem, the research has considered the peak valley price based on theCCHP system, and research about the optimal configuration of thesystem.In addition, the research considered the uncertainty of theusers demand and the fluctuation of the electricity price, also thesensitivity analysis of the electricity price and the operation hours ofCCHP system is carried out.Finally the paper gets the interval ofsystem economic operation.By quantifying operations, uses canchoose the right system based on the price of electricity or the user'sspecific energy needs in actual operation.The research analyzes theoperation economy and sensitivity of the CHHP.It is concluded thatthe system with energy storage device can not only meet the user'sdemand for energy consumption in different periods of the year, butalso provide the best economic results.