Genetic engineering is a process that uses laboratory-based technologies to change the DNA of an organism. This may involve changing a single base pair (A-T or C-G), deleting a region of DNA or adding a new segment of DNA. At present, this method is used widely in medicine, industry and agriculture. So, it plays an important role in society. The purpose of this article is mention to the benefits and risks of using genetic engineering in various ways including medicine and food production. In addition, it demonstrates the process of genetic engineering such as insulin production. Not only this mention about history development of genetic engineering but also its use in the future. Although using genetic engineering provides many advantages, it is concerned with medical ethics and the development of cancer. Therefore, one should consider both pros and cons by weighing whether it is valuable to use this method before reaching the last decision.