Yes, one view is to equate prospective study with cohort study, because cohort study is prospective from cause to result, from not ending to ending; Another way of saying this is that the design of the study occurred before the data collection, which is a concept put forward relative to the retrospective study. The so-called retrospective study refers to reviewing the summary law of clinical case data, and publishing papers is a common clinical research method. The main problem of retrospective study is that the clinical data collection did not consider the scientific research needs, and the integrity and homogeneity of the data were not guaranteed, so it was considered as a low-quality study. The way to overcome this shortcoming is to change the research process, from collecting data first and then designing the research plan, to designing the research plan first and then collecting data. Collecting data according to the pre-designed scheme can ensure the integrity and homogeneity of clinical data, which is a necessary condition for high-quality clinical research. The design before implementation has forward-looking characteristics, so it is called forward-looking research.