The invention provides a sensing device, a power reception device,a power transmission device, a non-contact power transmission system, and a sensing method, wherein the sensing device includes a circuit including at least a coil electromagnetically coupled to an outside; a temperature detection unit for detecting a temperature of the coil; a sensing unit for measuring a Q value of the circuit; and a correction unit for correcting the Q value measured by the sensing unit based on temperature information detected by the temperature detection unit.