From 1806 to 18 16, Hegel was the principal of a liberal arts middle school in Nuremberg, during which he wrote his main work "Logic". 18 16 autumn, Hegel went to Shanghai University as a philosophy professor. There, he wrote and published the outline of the famous encyclopedia of philosophy. This book made him famous. 18 18 years, at the invitation of the Prussian government, he became a professor at the University of Berlin and an official philosopher. During his stay at Berlin University, his research further expanded from religious philosophy and ethics to historical philosophy, aesthetics, law and other fields. 182 1 year, he published Principles of Legal Philosophy, which occupies an important position in the history of western legal thought, and this is also his masterpiece of legal thought. Hegel, with his profound knowledge and huge theoretical system, made his academic influence far beyond Germany. He also served as a member of the University Council and was elected President of Berlin University in 1830. 183 1 year1month 14 years, Hegel died of cholera in Berlin. His main works are Phenomenology of Spirit, Logic, Philosophy of Nature and Philosophy of Spirit.