Absorption thermal transportation system has great advantage over sensible heat system with low heat loss and long heat transportation distance. Furthermore, resorption system could reduce heat source demand and expanding utilization temperature range of low-grade heat. Nonetheless, output temperature of resorption system is limited without a second heat source at user site. In this paper, a composite resorption heat transportation system with multiple operation modes are conducted to utilize low-grade heat while improving energy transportation density. Higher energy transportation density and higher output temperature could be achieved by switching to upgrading mode and larger concentration difference upgrading mode. Analysis of source temperature, ambient temperature on system show great potentiality in stable low-temperature heat transportation compared to conventional absorption transportation system. A two-stage thermal energy storage cycle can be introduced to increase the solution concentration difference and achieve a temperature rise of 70–90 °C.