Hegel's logic is strategically based on philosophy. As the saying goes, "Familiarity is not true knowledge", he criticized some viewpoints in the past. First of all, unlike people's understanding of specific scientific's object in the past, the object of philosophy and religion is truth, and only God is the highest truth. Truth is also an absolute idea (absolute spirit) or a complete book. Hegel opposed "pluralistic philosophy". In his historical logic, there is only one system of philosophy, but it is at different stages. The development process of the history of philosophy is a cycle, and philosophy is the dialectical and continuous development of absolute ideas. Therefore, philosophy has no hypothetical beginning. It is not only a big circle, but also a specific rule in this circle. Therefore, philosophy has no hypothetical beginning. We can only look at philosophy itself dialectically. In other words, philosophy is both its own starting point and its own end point. Philosophy produces its own object and ends by returning to itself. Then, Hegel criticized the methods of intuition and reflection, but insisted on the method of concept. Philosophical thoughts appear in the form of concepts, and philosophy expresses (grabs) appearances with ideas, categories or concepts. For Hegel, the concept is concrete. Hegel repeatedly emphasized the particularity of philosophy, which is a cognitive way of conceptual thinking. On the contrary, people who enter philosophy by reflection and intuition are either lazy and impatient, or show some elitism and "natural concept". But the latter still shows some impatience, which is caused by their unaccustomed conceptual thinking.

? As early as in the preface, Hegel wanted to establish a new philosophy or a new logic. This logic is a science that studies pure ideas from the perspective of Hegel's philosophy, that is, a science that studies thinking and the rules and laws of thinking. In Hegel's view, the first feature of thought is dynamic universality, which is a "universal body that can realize itself" and can best express the absolute spirit. Thinking as the subject is the thinker, that is, I, and the relationship between thinking and object is active. The difference between it and feeling and representation is that feeling is only individuality, while representation is dominated by individuality and is the juxtaposition of facts, while thought should be promoted from representation to dialectics. But from a dialectical point of view, the universality of thought and the individuality of feeling are not exclusive. Thought is thought itself and the other side of thought (that is, the individuality of feeling). The second characteristic of thought is that its product is the essence and essence of things. First of all, after reflection-"understanding the universality of all things" and "seeking unity in miscellaneous things"-I think matter can be presented as the true colors of things, and everything that has been reflected is the product of thinking rather than a single mind. Hegel opposes Kant's statement that subjective knowledge is divorced from the thing itself, emphasizing that "truth should be objective." However, although the result of reflection is objective, thought is a subjective activity and "my activity", so thought is also the product of my freedom. In this way, Hegel dialectically unified the relationship between thinking and existence, and merged logic and metaphysics into new logic or Hegel's ontological logic. On this basis, the task of logic is to examine the ability and limit of thinking rules to grasp the truth. Truth is comprehensive and infinite. If we use a limited one-sided way of thinking (such as empirical and reflective way of thinking) to grasp infinite things, we will fall into an illusion. They are not the real form of expressing the truth of self-sustenance. Only pure thinking can grasp the truth, which is the most perfect way to know the truth, and people are also the most free when using pure thinking. Next, Hegel still made a critical journey. He criticized Descartes' simple metaphysical attitude with the concept of identity between thinking and existence. They didn't realize the contradiction contained in the thought itself, and only through reflection did they know the truth. It also criticized the criticism of empiricism and critical philosophy (Kant), and also criticized the "intuitive understanding" of Yekebi and Schelling.

? Hegel further defined and divided the departments of logic after abandoning the wrong views in the past. In Hegel's view, rational knowledge can be divided into three stages, that is, logical thought has three aspects in form: (1) abstract or intellectual aspects, that is, opposing thoughts that have not reached unity; (2) Dialectical or negative rationality, that is, in the dialectical stage, limited provisions sublate themselves and transition to their own opposites. Simply put, we can know a thing from its opposite, and dialectics here is only the transformation of simple contradictions, not the unification; (3) As far as speculative or positive rationality is concerned, the opposing sides have become an organic unity at this stage. Hegel thinks that these three aspects are inseparable, and thus deduces three parts of logic corresponding to the above: ontology; Essence theory; Conceptualism.

? Existentialism is only a potential conceptual stage and a superficial understanding. In "being", the various connections and characteristics of specific concepts have not been revealed. Hegel starts from "yes" here, and the starting point of logic is "pure existence". At the beginning of thinking, there is nothing but pure non-prescriptive thinking. Hegel's argument here means that other thoughts can't be logically self-consistent, the non-prescriptive beginning is the beginning, and all presuppositions depend on a certain basis, although it is advanced. According to Hegel's way, existence is not a fixed anchor, but a dialectical transition to its counterpart-nothing. The irregularity of the beginning of pure existence is a nihilistic thought. In other words, the thought of pure, non-standardized existence becomes a nihilistic thought because of its non-standardization, and existence is nothingness. This kind of non-prescriptive actually means unspeakable and absolute negation, so it does not exist in Hegel's sense. The transition of thinking from pure existence to existence is not without thinking, on the contrary, it is just thinking, so the transition from existence to existence, so the unity of opposites between existence and existence is the principle of change.