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Abstract: China is building more than 1GW of advanced coal-fired power plants every week. This interdisciplinary study investigates the technical and economic performance of retrofitting a 1000MW ultra supercritical pulverised coal-fired (USCPC) power plant locating at Shandong province in China. An ASPEN simulation model is designed to estimate the energy output penalty at different levels of capture. The retrofitted system consists of the conventional power generation unit, the additional post-combustion unit and other associated extra equipments. The ASPEN simulation results show that the efficiency penalty is approximately 8.6% for a 90% capture rate and 6% for a 50% capture rate in this retrofitting study. In addition, the simulation result of the process model is applied to analyse the value of retrofitting flexibility and the economic-viable chance of retrofitting the underlying project through a real option analysis model. The economic model reveals that the value of retrofitting option in the 1GW USCPC power plant reaches US$76 million and that a 40% economic viable possibility of retrofitting to capture CO2 in its remaining 26years lifetime under the hypothetical baseline scenario. The significant economic benefits of retrofitting an existing USCPC plant to CO2 capture implies the urgency to conduct a detail survey on the retrofitting prospect of Chinese coal-fired power plants and develop a guideline to maintain their retrofitting options open. [Copyright &y& Elsevier]