人的需要是主体一切活动的源泉、动力和出发点 ,具有客观性、社会性、历史性 ,主体的需要是价值形成的前提 ,价值是主体需要与客体属性的统一 ,是在满足人的需要的实践活动中产生和发展的。实践是价值的基础 ,其在价值关系中的作用表现为促使主、客体发生关系 ,并导致价值的产生和创造出新的价值。价值是实践能动性和创造性的源泉 ,它规定了实践的目的性 ,丰富了实践的选择性。需要、价值和实践是一个不断发展的动态的循环系统 Human needs are the source, motive force and starting point of all the activities of the subject, which are objective, social and historical. The needs of the subject are the preconditions for the formation of values. The value is the unification of the needs of the subject and the attributes of the object, Produced and developed in practice. Practice is the basis of value. Its role in the relationship of value is to promote the relationship between the subject and the object, and lead to the generation of value and creation of new value. Value is the source of practical initiative and creativity, which stipulates the purpose of practice and enriches the selectivity of practice. Needs, values ​​and practices are a dynamic, evolving circulatory system