Abstract
This purpose of research is to design a set of APP interface which is friendly to middle and old. It analyzed four observation projects as evaluation conditions included Icon Identification, Word Identification, Function Identification, Operation Process by literature. Through method of behavior observation and survey for degree of difficulty of 31 people who are middle and old age, found when middle amd old age use APP, the Word and Symbol Identification and the Save Symbol are more difficult than others when elders are using app which is for graphic editing. This purpose presented four observation items for elders using.
