PROBLEM TO BE SOLVED: To provide a heat storage management system that is free from mixing of air or water, which may cause a heat medium to deteriorate, into a heat medium flow passage in respective stages of heat accumulation in a heat accumulation container, storage and transportation of the heat accumulation container, and heat dissipation from the heat storage container, and secures wide temperature ranges of heat accumulation temperature and heat dissipation temperature and also performs efficient heat storage and heat transportation.SOLUTION: A chemical heat accumulation material is subjected to a dehydration reaction by supplying heat of heat accumulation/dissipation facilities thereto so as to accumulate heat in a detachable heat accumulation container, which is mounted on the same or different heat accumulation/dissipation facilities so as to dissipate and use the heat accumulated in the chemical heat accumulation material through a hydration reaction of the chemical heat accumulation material. When
