長期以來人類因為操作電腦所造成的傷害，造成許多的後遺症，諸如腕隧道症候群、下背痛等，為了減少由於操作電腦所造成的症狀，如何改進操作的人因設計一直是重要的探討議題；平板電腦的出現在於能使操作者更方便的使用筆式輸入的電腦，而這樣一個操作的方式創造出新的電腦使用族群，也可能造成新的人因問題產生，為了提供使用者在操作平板電腦時的合適姿勢與注意要點，本研究從操作平板電腦的姿勢著手，分析在操作平板電腦時所會採用的操作姿勢，提供使用者在操作平板電腦時的建議。
　　在第一階段的實驗中，我們分類出手部三種類別與腳部兩種類別的姿勢；接著在第二階段的實驗中，以姿勢組合的方式，分出五種姿勢組合，分別是1、左方支撐與翹腳的組合，2、右方支撐與翹腳的組合，3、左方支撐與雙腳平放的組合，4、右方左方支撐與雙腳平放的組合，5、無支撐雙腳平放的組合。綜合數據與人體生物學，我們認為應盡量避免採取手部無支撐與腳部平放的姿勢，而手部右方支撐與腳部平放的姿勢，以及手部左方支撐與腳部蹺腳的姿勢，是可以採用的方式，當然，這是在沒有其他支撐面的時候，而手部無支撐與腳部平放的姿勢組合則是避免使用，以免造成頸頭部的傷害。
　　根據文獻的資料，工作一小時最好休息15分鐘，這樣的方式對於一般的桌上型電腦來說或許是足夠的，但是在平板電腦的無支撐空間的操作環境下，受測者在使用重達1.8公斤的平板電腦時，在20分鐘時已出現極疲勞的狀況，因此，對於這樣工作環境的使用者，最好能減少操作的時間或是短暫的休息，避免長時間處於固定姿勢的操作方式，而腳部或是手部的輔助性支撐是需要的，這樣在人體的負擔上才能減至最小。

　　Since human started to using computer as common tools, people began suffering musculosketal syndrome ,like Carpal tunnel syndrome, Low back pain, etc. How to minimize the syndrome and improving computer ergonomic design is an important issue. By using Tablet PC, people could comfortable operate computers. But the new way to operate computers can also make new syndromes. In order to provide suggests for people during using Tablet PC, this research focus on the postures during using Tablet PC. We analysis the postures, and list of suggests and warming.
　　In first experiment, we find that there are three kinds of hand postures and two kinds of leg postures during using Tablet PC. In second experiment, we combine the hand and leg postures as independent factors. There are five combine postures, first posture is left hand support combine cross-legged, second posture is right hand support combine cross-legged, third posture is left hand support combine abreast legs, forth posture is right hand support combine abreast legs, fifth posture is no hand support combine abreast legs. The result shows that people should not use no hand support combine abreast legs posture. And right hand support combine abreast legs and left hand support combine cross-legged postures are better than other postures.
　　It is normal when people take fifteen minutes after one hour work. But people operate Tablet PC which weight is 1.8 kilogram in twenty minutes, they have been extremely exhausted. We suggest people who operate Tablet PC in these situations, they must decrease the time in operating Tablet PC. At last, hand or leg supports are necessary during people using Tablet PC without other hardware support.

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