So far, appearance had become one of the most important things in identifying a person. When our society increasingly depends on material values more and more, appearance gradually becomes the reflection of our personality in other people mind.
I don't feel that this part is relevant to the topic.
had has become
other people mind
other people's mind
the real-person inside each one
making us to be impressed
that impresses us
When looking at people's appearance, we just realize ones we focus on...
This part is quite confusing.
However, the truth is that appearance could not tell us their characteristics...
. This just repeats your idea in the introduction.
appearance could be changed to suit emotions
This is an interesting idea that needs developing.
the only way that could help us judging people is to get them well.
What do you mean by "to get them well"?