A multi-pipe-switching heat exchange apparatus, comprising: a heating module being used to produce a heat source and having at least one heating boiler; an auxiliary module deposited beside the heating module and having at least one spare boiler; a buffering module connected to and communicating with the heating module and the auxiliary module, and having a buffering body connected to and communicating with the at least one heating boiler and the at least one spare boiler, and having an exchange fluid to transport heat sources that are generated from the at least one heating boiler and the at least one spare boiler in the buffering body; a first pipeline set deposited and connected between the buffering body and the heating module; and a second pipeline set deposited and connected between the buffering body and the auxiliary module; and an operation module connected to and communicating with the buffering module and having an operation end; and a third pipeline set connected to and communicating with the buffering body and the operation end; wherein the pipeline sets (32, 33, 41) are independent without communicating with each other; wherein the multiple pipe switching heat exchange apparatus has multiple valve modules, and each one of the valve modules being of the dual-tube type, deposited at a connecting end of the buffering body such that each one of the pipeline sets (32, 33, 41) is connected to and communicates with the buffering body, and each one of the valve modules having; two branch pipes connected to and communicating with the buffering body and one of the pipeline sets (32, 33, 41); two pumps deposited on the two branch pipes; and multiple control valves deposited on the branch pipes beside the pumps; characterized in that the multi-pipe-switching heat exchange apparatus comprises: a preheater deposited beside the at least one heating boiler, connected to and communicating with the at least one heating boiler to adjust the temperature of the heat source before the heat source enters the at least one heating boiler via the preheater to prevent excessive temperature of the heat source from directly entering and damaging the at least one heating boiler; a first circulation loop being a closed loop, formed between the buffering body, the preheater, and the at least one heating boiler; a second circulation loop being a closed loop, formed between the buffering body and the at least one spare boiler; and a third circulation loop being is a closed loop, formed between the buffering body and the operation end of the operation module. a heating module being used to produce a heat source and having at least one heating boiler; an auxiliary module deposited beside the heating module and having at least one spare boiler; a buffering module connected to and communicating with the heating module and the auxiliary module, and having a buffering body connected to and communicating with the at least one heating boiler and the at least one spare boiler, and having an exchange fluid to transport heat sources that are generated from the at least one heating boiler and the at least one spare boiler in the buffering body; a first pipeline set deposited and connected between the buffering body and the heating module; and a second pipeline set deposited and connected between the buffering body and the auxiliary module; and an operation module connected to and communicating with the buffering module and having an operation end; and a third pipeline set connected to and communicating with the buffering body and the operation end; wherein the pipeline sets (32, 33, 41) are independent without communicating with each other; wherein the multiple pipe switching heat exchange apparatus has multiple valve modules, and each one of the valve modules being of the dual-tube type, deposited at a connecting end of the buffering body such that each one of the pipeline sets (32, 33, 41) is connected to and communicates with the buffering body, and each one of the valve modules having; two branch pipes connected to and communicating with the buffering body and one of the pipeline sets (32, 33, 41); two pumps deposited on the two branch pipes; and multiple control valves deposited on the branch pipes beside the pumps; a preheater deposited beside the at least one heating boiler, connected to and communicating with the at least one heating boiler to adjust the temperature of the heat source before the heat source enters the at least one heating boiler via the preheater to prevent excessive temperature of the heat source from directly entering and damaging the at least one heating boiler; a first circulation loop being a closed loop, formed between the buffering body, the preheater, and the at least one heating boiler; a second circulation loop being a closed loop, formed between the buffering body and the at least one spare boiler; and a third circulation loop being is a closed loop, formed between the buffering body and the operation end of the operation module.