Under the background that the belief is becoming problem in modern society, the article researches the humanistic Ontology basis on which the belief can be formed and its real meaning; meditates and criticizes the wrong thinking area of the traditional Transcendental belief; puts emphasis on the idea of the Marx's humanity and philosophical reformation. It shows the reality direction and the value of the reformation of the Marx's belief as well as the belief field with the inner unification of the truth and the value. With the trend that the modern human belief spirit returns to the living world , it shows the duality of the modern belief's returning the living world: be close to the life and meet with nihility; With the study of the life basis of the modern human belief spirit , it shows the value of the modern belief spirit, and the meaning of the belief of Marx's Humanity Integration.In modern society, the human has stood on the very beginning of a new century. When the human waves to say goodbye to the old century , but hasn't clear up what has happened , they have to be involved into the new life. The confusion and the losing of the belief are the common feeling of the west and the east. While the modern west society is changing from the modern society to the later modern society, the confusion of the belief that is caused by the death of God has made the westerns suffer from the spirit anxiety of It's difficult to endure the losing in the life. The spirit phenomenon of the far from the grand and the losing of the belief also appear when the modern china society is changing to the modernized type. Human's losing the belief means losing the extreme concern of the meaningfulness of it's existence. Therefore the meaning of the life will become confused. So, How to make the human get out of the belief crisis , show the real base and the meaning of the belief and rebuild the modern belief spirit to make the life meaningful and have the extreme valuable concern , has become the important problem that the modern human needs to solve. As the theory of the human self-consciousness and the self-meditation , the philosophy should make the rational questioning and meditation to it.Showing the Ontology base of the belief is the prerequisite of rebuilding the modern belief spirit. According to the writer, it should need to meditate the popular understanding of the belief. In the daily life, The ideas such as The belief is equal to the religion, the belief is superstition, To have belief because of the usefulness, It doesn't matter whether the belief exists or doesn't exist, form the natural attitude of the belief. It should be questioned and criticized. To understand the belief deeply needs to master the Ontology base of the belief. As far as its nature, it is discussed for the human existence. As the extreme existence. extreme explanation and extreme value, the Ontology is the human value promise beyond the nature. In this way, The Ontology theory is regarded as the human Ontology theory. The extreme meaning and the belief that the Ontology has is the same. Therefore, The understanding of the belief base needs to be made according to the human existence. The existence of the belief depends on not only the human's self-knowing of its limitation , but only the nature with surpassing. In this way, the essential of the belief is the human extreme value concern for the meaningfulness of its existence. As an extreme value concern, the belief not only makes the human existence enriched and steady, but also gives the human the courage for the existence to improve the field of the human existence.In the traditional society, the religious beliefs become the typical form of the traditional transcendental ideas. The materialization of the belief , the sharp opposition between the rationality and the belief, the separation of the holy world and the mundane world, are the general feature of the transcendental ideas. With the prerequisite of the humanity supp