This study aims at developing a comprehensive assessment method of motor function practicable for use at home. The motor function can be thought of as the resultant of many categories of fitness, so that a comprehensive assessment technique is desirable. In this study, the motor function is evaluated in terms of cardiorespiratory fitness and the muscular fitness. The cardiorespiratory fitness is assessed by the estimated maximum O2 consumption rate and the total heart beat index. The muscular fitness is assessed by the maintenance time of the maximum speed cycling. The suggested method is evaluated on the young athletes and also on the non-athletic young subjects. Both the cardiorespiratory and muscular fitness of two groups showed significant difference. It is expected that the suggested method be useful for a comprehensive evaluation of the motor function at home.