A cooling-abnormality detecting system that is adapted to perform abnormality detection for a cooling system in which a heat generating component and a cooling component come into contact with each other via a contact section and the cooling component dissipates heat from the heat generating component, the cooling-abnormality detecting system comprising: a heat-generating-component-temperature detecting unit that is adapted to detect temperature of the heat generating component; a cooling-component-temperature detecting unit that is adapted to detect temperature of the cooling component; a heat-resistance calculating unit that is adapted to calculate a heat resistance value of the contact section between the heat generating component and the cooling component by dividing the temperature difference between the temperature T H of the heat generating component and the temperature T C of the cooling component by the power consumption value P H of the heat generating component, and is adapted to output the heat resistance value, the cooling-abnormality detecting system comprising an abnormality determining unit (50,50a) adapted to determine whether the heat resistance value is within a preset range and when the heat resistance value is out of the preset range, an abnormality signal is output from the abnormality determining unit to an output unit; characterized by said cooling-abnormality detecting system further comprising: an intra-system-temperature detecting unit that is adapted to detect an intra-system temperature, which is a temperature in a housing in which the heat generating component and the cooling component are provided; and a temperature-ratio calculating unit that is adapted to calculate a ratio of a temperature difference between the intra-system temperature and the temperature of the cooling component and a temperature difference between the temperature of the cooling component and the temperature of the heat generating component, wherein when the calculated ratio is out of a preset range, the cooling abnormality detecting system is adapted to determine that abnormality is present between the heat generating component and the cooling component and an abnormality signal is output from the abnormality determining unit (50, 50a) to the output unit. a heat-generating-component-temperature detecting unit that is adapted to detect temperature of the heat generating component; a cooling-component-temperature detecting unit that is adapted to detect temperature of the cooling component; a heat-resistance calculating unit that is adapted to calculate a heat resistance value of the contact section between the heat generating component and the cooling component by dividing the temperature difference between the temperature T H of the heat generating component and the temperature T C of the cooling component by the power consumption value P H of the heat generating component, and is adapted to output the heat resistance value, the cooling-abnormality detecting system comprising an abnormality determining unit (50,50a) adapted to determine whether the heat resistance value is within a preset range and when the heat resistance value is out of the preset range, an abnormality signal is output from the abnormality determining unit to an output unit; characterized by said cooling-abnormality detecting system further comprising: an intra-system-temperature detecting unit that is adapted to detect an intra-system temperature, which is a temperature in a housing in which the heat generating component and the cooling component are provided; and a temperature-ratio calculating unit that is adapted to calculate a ratio of a temperature difference between the intra-system temperature and the temperature of the cooling component and a temperature difference between the temperature of the cooling component and the temperature of the heat generating component, wherein when the calculated ratio is out of a preset range, the cooling abnormality detecting system is adapted to determine that abnormality is present between the heat generating component and the cooling component and an abnormality signal is output from the abnormality determining unit (50, 50a) to the output unit. an intra-system-temperature detecting unit that is adapted to detect an intra-system temperature, which is a temperature in a housing in which the heat generating component and the cooling component are provided; and a temperature-ratio calculating unit that is adapted to calculate a ratio of a temperature difference between the intra-system temperature and the temperature of the cooling component and a temperature difference between the temperature of the cooling component and the temperature of the heat generating component, wherein when the calculated ratio is out of a preset range, the cooling abnormality detecting system is adapted to determine that abnormality is present between the heat generating component and the cooling component and an abnormality signal is output from the abnormality determining unit (50, 50a) to the output unit.