An evaluation method of evaluating vehicle driving skills, the evaluation method comprising the steps of: obtaining a first evaluation result on the vehicle driving skills based on measured data; wherein the first evaluation result is a vehicle stability score (Sv) obtained by a vehicle stability evaluation unit based on the yaw rate, the roll rate and the pitch rate, obtaining a second evaluation result on the vehicle driving skills based on the measured data; wherein the second evaluation result is a turning performance score (Tv) obtained by a turning performance evaluation unit based on the roll angle, the pitch angle and the positional information, generating conversion information empirically or experimentally, said conversion information being implemented as a conversion map and/or a conversion function; storing said conversion map and/or said conversion function in an evaluation criterion memory unit in advance, obtaining an overall characteristic score from the first evaluation result and the second evaluation result by an overall evaluation unit by reading out said conversion map and/or said conversion function from said evaluation criterion memory unit and using said conversion map and/or said conversion function; and indicating the overall characteristic score to a driver via an output unit, wherein the conversion map and/or said conversion function read out from said evaluation criterion memory unit defines the overall characteristic score in such a way that the overall characteristic score decreases as the second evaluation result increases if the first evaluation result is lower than a threshold (b), and in such a way that the overall characteristic score increases as the second evaluation result increases if the first evaluation result is higher than the threshold (b), the conversion information defines the overall characteristic score in such a way that the overall characteristic score increases as the first evaluation result increases, such that when the vehicle stability score (Sv) is lower than the threshold (b), a message is given to the driver to require selective enhancement of only the vehicle stability score. obtaining a first evaluation result on the vehicle driving skills based on measured data; wherein the first evaluation result is a vehicle stability score (Sv) obtained by a vehicle stability evaluation unit based on the yaw rate, the roll rate and the pitch rate, obtaining a second evaluation result on the vehicle driving skills based on the measured data; wherein the second evaluation result is a turning performance score (Tv) obtained by a turning performance evaluation unit based on the roll angle, the pitch angle and the positional information, generating conversion information empirically or experimentally, said conversion information being implemented as a conversion map and/or a conversion function; storing said conversion map and/or said conversion function in an evaluation criterion memory unit in advance, obtaining an overall characteristic score from the first evaluation result and the second evaluation result by an overall evaluation unit by reading out said conversion map and/or said conversion function from said evaluation criterion memory unit and using said conversion map and/or said conversion function; and indicating the overall characteristic score to a driver via an output unit, wherein the conversion map and/or said conversion function read out from said evaluation criterion memory unit defines the overall characteristic score in such a way that the overall characteristic score decreases as the second evaluation result increases if the first evaluation result is lower than a threshold (b), and in such a way that the overall characteristic score increases as the second evaluation result increases if the first evaluation result is higher than the threshold (b), the conversion information defines the overall characteristic score in such a way that the overall characteristic score increases as the first evaluation result increases, such that when the vehicle stability score (Sv) is lower than the threshold (b), a message is given to the driver to require selective enhancement of only the vehicle stability score.