Molecular typing usually refers to the evaluation of tumor conditions from tissues obtained by biopsy or tumor cells circulating in the bloodstream in order to make judgments about the treatment as well as the prognosis of the patient. Molecular typing can analyze DNA, RNA and proteins from biopsy tissues or tumor cells, and then analyze the biological data of the tumor and find out the feasible and specific treatments for the gene mutations. This multi-dimensional analysis can only be helped by bioinformatics methods to effectively process the huge amount of data. Molecular typing was initially applied to DNA analysis, but along with the development of science and technology, the meaning of molecular typing has become broader, gradually covering the analysis and processing of RNA and protein. It is recommended to follow the advice of your specialist whether or not molecular typing is necessary.