Having a good evaluation of the health status of wind turbines is of great significance for distributing wind farm power, reducing operational and maintenance costs and prolonging the service life of wind turbines. With the growth of installed capacity, health status evaluation has attracted extensive attention. There is a complexity of health status evaluation methods, and this may be the reason that there are few summaries of wind turbine health status evaluation methods. Therefore, based on existing research results, this paper combs the literature to assess the current situation of wind turbine health status evaluation. First, this paper introduces the methods, classifies the existing methods, and analyzes their advantages and disadvantages. Second, it introduces a data source of wind turbine health status evaluation and the indicators describing its health degree. Finally, it puts forward the key points for future feasibility study from the aspects of data analysis of health status evaluation, the interaction between unit health status and control, and the health status evaluation and prediction of the whole machine. This work is supported by the Key Research and Development Projects of Shaanxi Province (No. 2021GY-106).