There are various value relations and value phenomena. On the one hand, there are various levels of subjects, such as individual, group and humankind in general, and subjects on the same level are also distinctive from each other; on the other hand, anything relevant to human practice, either natural or man-made products, either cultural phenomena or human beings themselves could be the object of specific needs of society, group or individual, i.e. be the object of specific value relation. Value relation constructs and changes in different fields, on different levels and at different times; and it takes on different yet complex forms. It is a system centering on human beings.