Educational purpose is the starting point of all educational work, and the realization of educational purpose is the end point of educational activities, which runs through the whole process of educational activities and has guiding significance for all educational work. The guiding significance of educational purpose to the whole educational work is mainly reflected in the following aspects: the guiding role of educational purpose, once established, becomes the direction of people's action, not only pointing out the direction for the educated, predetermining the development result, but also pointing out the direction and goal for the educators; The incentive function of educational purpose reflects people's needs and motives and is the basis of people's joint efforts; The evaluation function of educational purpose is the fundamental basis and standard to measure and evaluate the effect of educational implementation.