在國內潛水界，一般將水肺潛水區分休閒水肺潛水與職業水肺潛水，本文主 要在探討由休閒潛水衍生至技術潛水，並探討其相同與差異性。兩者為同一目的， 以休閒、遊憩為主，並欣賞海底景觀、海洋生物等水肺潛水活動，因此休閒水肺 潛水分為休閒潛水與技術潛水兩大領域。休閒潛水特點是使用開放式水肺裝備、 使用一般空氣、免減壓程序、有潛水深度限制、從事開放式潛水環境等，較安全 也容易參與；休閒潛水訓練課程是由初級、進階、高級等循序漸進，最高為教練 訓練官課程，為「直式訓練」。技術潛水特點是使用循環水肺裝備或特殊開放式裝 備、使用混合氣體、操作減壓程序、延伸潛水深度與時間、從事遮蔽或封閉之潛 水環境等，從事技術潛水有一定的難度，因此必頇具有休閒潛水員證照才可學習 技術潛水課程，初級課程為進階高氧課程，課程結束後即可學習其他技術課程，為「橫式訓練」。

In Taiwan, scuba diving is usually divided into recreational diving and industrial Diving. The article mainly discusses the similarities and differences from scuba diving to technical diving. Both scuba diving and technical diving are base on leisure, recreation and enjoying the undersea views and marine organisms. Therefore, recreational diving is divided into two main parts, scuba diving and technical diving. Scuba diving uses open-circuit equipment and normal atmospheric air in an open water area. It doesn‘t have to decompress and it has deep limitation, so recreational diving is safer and easier than technical diving. Recreational diving training course is from basic, middle to high level step by step, and the highest is instructor trainer course, it called ―vertical training.‖ Technical diving uses rebreather or special open-circuit equipment and use of mixed gases. It is operating the decompression procedure, Diving depth Deeper, Diving longer, execution of a closure or sheltered dive environment etc, it is more difficult operation. If you want to learn technical diving there must be a scuba diving license, the introductory course is to use advanced high-oxygen, the courses passed the test you can learn other special courses, it is a transverse training methods.