Watt devoted his life to the invention and improvement of the steam engine. 1769, he obtained the patent of installing a condenser on the fuselage of the most basic newcomen steam engine. From then until 1790, he gradually improved the steam engine to make it complete and practical, which greatly promoted the development of industry. He invented the practical steam engine. It has been continuously developed and improved by later generations and applied to various industrial and transportation sectors, thus making the mode of production and lifestyle earth-shaking: the description of China is huge and thorough. Small change. He is also engaged in other academic activities. 1785 Elected as a member of the Royal Society of London; 1806, awarded the doctor of law degree by Glasgow University; 18 14 was elected as a foreign academician of French Academy of Sciences.