This paper tries to makes an exposition of the formation, evolvement and development of the category of “Practice” in terms of the history of the development of Western ideology. The reason of a parochial explanation of the “Practice” in a sense of Marxist Practical Materialism and its some misunderstanding in the past time in this area is mainly come from the wrong understanding of the critique of Hegel’s and Feuerbach’s viewpoint of practice made by the classical Writers’ of Marxism. Comparative to K. Marx’s famous thesis that “social life is practical essentially”, the paper holds that the traditional understanding and definition of the category of Practice is doomed to be the one-sided position obviously. In the logical system of Marxist viewpoint of history, the structure of practical activity comes to be the bottom structure, while the social structure appears to be the upper structure. This idea manifests the subjective position of the human beings in the social history. Further more, it provides a theoretical explanation and logical support for the formation of development of social structure. $$$$ This paper tries to makes an exposition of the formation, evolvement and development of the category of “Practice” in terms of the history of the development of Western ideology. The reason of a parochial explanation of the “Practice” in a sense of Marxist Practical Materialism and its some misunderstanding in the past time in this area is mainly come from the wrong understanding of the critique of Hegel’s and Feuerbach’s viewpoint of practice made by the classical Writers’ of Marxism. Comparative to K. Marx’s philosophical thesis that “social life is practical essentially ”, the paper holds that the traditional understanding and definition of the category of Practice is doomed to be the one-sided position obviously. in the logical system of Marxist viewpoint of history, the structure of practical activity comes to be the bottom structure , while the social structure appears to be the upper structure. This idea manifests the subjective position of the human beings in the s ocial history. Further more, it provides a theoretical explanation and logical support for the formation of development of social structure. $$$$