To provide an engine-driven refrigerating cycle device, and a heating system for improving heating capacity in a state of an outside air temperature being low, and the heating capacity being insufficient.

An intake heater 11 is arranged in the middle of an intake air passage 1a of an engine. A control device 150 performs intake air heating for heating intake air of the engine 1 by the intake heater 11 when the outside air temperature is lower than a prescribed value, and recovers exhaust heat for heating a refrigerant by a refrigerant heater 7. This invention recovers a hated heat quantity as the exhaust heat by performing the intake air heating in operation at low temperature time, and uses the heat quantity as a heating heat quantity, and increases an exhaust heat quantity itself by activating sluggish engine combustion at low temperature time. Thus, the heating capacity can be efficiently improved by recovering the exhaust heat while performing the intake air heating in a state being low in the outside air temperature, and being insufficient in the heating capacity.