風力發電為近年來受全世界矚目的綠色能源之一，其優點為發電成本低廉、對生態衝擊較低、碳排放少、無空氣汙染且穩定性高等，因此全世界風力發電機組的能見度越來越高。在全球風力發電機組數量及發電量逐年增長之下，風力發電機的檢測、保養與維修課題也逐漸受到重視。由於風力發電機組非常龐大，無法像檢測常規機械裝置一樣時常進行拆解或破壞性檢測，因此在各個檢測技術中，非破壞性檢測遂成為檢測風力發電機的主流。本文將介紹風力發電機可能的破損原因、各種較常見應用於風力發電機的非破壞性檢測方法和討論各檢測方法的優缺點。

In recent years, the wind power is one of the green energy sources that has attracted worldwide attention due to its low cost of power generation, low ecological impact, low carbon emissions, no air pollution, high stability, etc. Therefore, the visibility of worldwide wind turbines has become much higher. With increasing annual growth of global wind turbines and power generation, the inspection, maintenance, and repair of wind turbines have gradually received attention. Because the wind turbine systems are massive, the maintained components can't be easily disassembled and inspected one by one nor destructively inspected like conventional mechanical devices. Hence, the non-destructive testing (NDT) under various inspection technologies for wind turbines have become the mainstream inspection method. This article will introduce the possible causes of fractures to wind turbines and commonly various non-destructive testing methods. Finally, the advantages and disadvantages of each inspection method are summarized in the conclusion.