The title of researcher is usually equivalent to the senior title in scientific research institutions or universities in China, corresponding to the senior professional and technical post level. The researcher belongs to the senior title, which is equivalent to the title of professor. Scientific researchers are evaluated by the state, master the latest progress in the field of disciplines, and achieve high-level research results. The title series of researcher includes research intern (junior), assistant researcher (intermediate), associate researcher (deputy senior) and researcher (senior). Teachers in institutions of higher learning have the following titles: professor, associate professor, lecturer and assistant lecturer. According to "People's Republic of China (PRC) * * and People's Republic of China (PRC) Personnel Department Professional Title Management Appraisal System", professional title is a kind of performance of technical personnel's working ability, which is evaluated by professional title evaluation committee. University researcher is equivalent to the title of professor, and researcher is a kind of natural science research series.