The invention discloses a baking heat accumulation energy-saving technology which has the characteristics of low energy consumption in operation, safety, energy saving and environmental friendliness, and ensures small temperature gradient in a baking chamber, fast temperature rise and long service life as well as high temperature control accuracy and uniform heating of the baked object. After a heating medium flows through a heat accumulation metal finned tube and the set temperature is reached, the heating medium is transferred to other baking chambers so as to continue working; and the temperature drop of the heat accumulation metal finned tube is slow so as to maintain the temperature of the baking chamber. The energy-saving heat accumulation technology can be widely applied to the fields of food baking, metal coating baking, thermal assembly of metal, metal baking with slow fire, warming up of chambers and the like; and moreover, in the technology, energy sources such as electric energy, fuel gas, fuel oil, coal, firewood and the like can be utilized, thus the energy-saving heat accumulation technology can be used for realizing baking in multiple baking chambers.