Modern biotechnology is generally thought to include genetic engineering, cell engineering, enzyme engineering and fermentation engineering, and almost all of the development of these technologies is closely related to cell culture, in particular in the field of medicine development, cell culture has a special role and value.For example, genetic engineering drug or vaccine in the study a lot in the production process is realized by the cell culture.Many with CHO cells genetically engineered hepatitis b vaccine as a vector;Cell engineering is not cell culture hybridoma monoclonal antibody, is completely realized by the cell culture, even now, the rapid development of genetic engineering antibody can not be separated from cell culture.Are of much interest to gene therapy, somatic cell therapy can be achieved also through cell culture process, fermentation and enzyme engineering and cell cultures are closely related.In conclusion, cell culture in the development of the biotechnology industry as a whole has played a key role.