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In 2009, Jiangsu province of China supplied 99.6 percent of its total energy consumption with fossil fuels, of which 82 percent was imported from other provinces and countries. With rising energy demand, frequent energy shortages, and increasing pollution, it is essential for Jiangsu to put more emphasis on improving its energy efficiency and utilizing its renewable resources in the future. This paper presents the integrated energy pathway for Jiangsu during its social and economic transformation until 2050. EnergyPLAN is the chosen energy system analysis tool, since it accounts for all sectors of the energy system that needs to be considered when integrating large-scale renewable energy. A current policy scenario (CPS) based on current energy policies and an ambitious policy scenario (APS) based on large-scale integration of renewable energy and ambitious measures of energy efficiency improvement are proposed. The two energy pathways are modeled and compared in terms of technology combination, non-fossil fuel shares of primary energy supply, socioeconomic costs, and CO2 emissions. The insights from these pathways can provide valuable input for Jiangsu's future energy policies. In 2009, Jiangsu province of China supplied 99.6 percent of its total energy consumption with fossil fuels, of which 82 percent was imported from other provinces and countries. With rising energy demand, frequent energy shortages, and increasing pollution, it is essential for Jiangsu to put more emphasis on improving its energy efficiency and utilizing its renewable resources in the future. This paper presents the integrated energy pathway for Jiangsu during its social and economic transformation until 2050. EnergyPLAN is the chosen energy system analysis tool, since it accounts for all sectors of the energy system that needs to be considered when integrating large-scale renewable energy. A Current Policy Scenario (CPS) based on current energy policies and an Ambitious Policy Scenario (APS) based on large-scale integration of renewable energy and ambitious measures of energy efficiency improvement are proposed. The two energy pathways are modeled and compared in terms of technology combination, non-fossil fuel shares of primary energy supply, socioeconomic costs, and CO2 emissions. The insights from these pathways can provide valuable input for Jiangsu’s future energy policies.