The invention discloses a supercharged diesel engine EGR (Exhaust Gas Recirculation) system intelligent cooling device, comprising an EGR mixer (3), a mechanical water pump (4), an electric control fan (5), a radiator (6), a thermolator (11), an EGR cooler (13), an electric control EGR valve (14), an engine ECU (Electronic Control Unit) (18), a temperature sensor (19), an exhaust gas intercooler (8) and an electric control two-position three-way valve (12), wherein an inlet of the electric control two-position three-way valve (12) is communicated with a gas outlet of the EGR cooler (13); outlets in two ends of the electric control two-position three-way valve (12) are respectively communicated with an exhaust gas inlet of the EGR mixer (3) and a gas inlet of the exhaust gas intercooler (8); a gas outlet of the exhaust gas intercooler (8) is communicated with the exhaust gas inlet of the EGR mixer (3); the electric control EGR valve (14), the electric control fan (5), the temperature sensor (19) and the electric control two-position three-way valve (12) are respectively connected with the engine ECU (18) electrically.