To provide a hydrogen filling system equipped with a temperature detector which corrects the output of a sensor element degraded by hydrogen exposure and measures the temperature, at filling of hydrogen.

The hydrogen filling system equipped with the temperature detector includes a tank 10 having a pressure-resistant structure for filling hydrogen; a valve 12 equipped with a gas passage for filling hydrogen into the tank 10; a first temperature sensor 100 attached to the valve 12 inside the tank 10; a second temperature sensor 110 provided outside the tank 10; and a control part 30, equipped with a compensating means which corrects the output of the first temperature sensor 100, on the basis of the output of the second temperature sensor 110.

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