The Digital Clinometer is an intelligent angle-measuring instrument developed by employing digital angle sensor and several modern technologies. It is capable of absolute/relative angle measurement, angle locking, digital display, CPU fraud-prevention, and interconnection with computers, high precision and is convenient for using. It can ensure the precision of horizontality of mechanism process, frock and equipment. It is widely applied in machinery industry. Its invention has pushed the angle measuring technology of machinery industry in China to the world-advanced group in which it is “electronic detection, digital display”. The Digital Clinometer is the first choice for the engineering measurement personnel.