The utility model discloses a blast furnace gas distributed energy system is mainly through optimizing distribution to the regional ability source user of blast furnace ironmaking to blast furnace gas jointly supplies multiple energy forms such as cold, heat, electricity, merits for fuel. The utility model discloses the steam that blast furnace gas distributed energy system's blast furnace gas boiler produced passes through the acting of back pressure steam turbine drive blast furnace air machine earlier, then drive condensing steam turbine drive generator work the?power?output, drives hot water type absorption refrigeration unit work when further carrying out step recycle output heat source to blast furnace gas waste heat of boiler flue gas and provides the cold source for the user of freezing. The utility model discloses blast furnace gas distributed energy system has realized the thermodynamic (al) performance?improvements of system, has improved the energy comprehensive utilization efficiency of system.