The purpose of this study was to investigate the relationship between learning motivation and self-directed learning under different learning strategies on the students in the institutes with part-time at night or the students for extension education. The results of this study can also be use to help adult educator to promote the ability of self-directed learning for adult. 1,191 students completed self-report of self-directed learning readiness questionnaire, learning motivation scale and learning strategies scale. The learning strategy was divided into high, medium and low three groups, and was formed the dummy variable. Data are processed by stepwise regression. Results indicated the higher the score of the learning strategy and learning motivation is, the stronger the self-directed learning readiness is. So, to enhance learning motivation and learning strategy at same time can bring up greatly self-directed learning readiness.