We have developed a micro crossed helical gear endurance test system. In this study, we performed the acceleration test of relatively small module spur gear. Then, based on the result, we evaluated endurance test system and test gears. From the result of the experiments, we obtain the following results; (1) We developed a micro crossed helical gear endurance test system. (2) With the increase in rotational speed, the maximum temperature rise of the gear neighborhood tends to increase. (3) In the range of the experimental condition in this study, damage of tooth surface or partial contact was not confirmed.